Federal Register / Vol. 86, No. 154 / Friday, August 13, 2021 / Proposed Rules 44663

(5) For each fan vibration level reported, (k) Related Information incorporate new or more restrictive the fan hub serial number and hours time-in- (1) For more information about this AD, airworthiness limitations, as specified service for this fan hub. contact James Galstad, Aviation Safety in a European Union Aviation Safety (6) Installation date and service bulletin Engineer, Wichita ACO Branch, FAA, 1801 S Agency (EASA) AD, which is proposed (SB) revision level for the installation of the Airport Road, Wichita, KS 67209; phone: for incorporation by reference. The FAA bracket assembly with pad fuel flow meter (316) 946–4135; email: james.galstad@ is proposing this AD to address the and hose if installed before the effective date faa.gov or [email protected]; or Thomas unsafe condition on these products. of this AD. Teplik, Aviation Safety Engineer, Wichita (7) Any failures of the bracket assembly ACO Branch, FAA, 1801 S Airport Road, DATES: The FAA must receive comments with pad fuel flow meter and hose installed Wichita, KS 67209; phone: (316) 946–4196; on this proposed AD by September 27, in accordance with any SB listed in email: [email protected]. 2021. paragraph (h) or any prior revision of these (2) For service information identified in ADDRESSES: You may send comments, SBs. this AD, contact Learjet Inc., One Learjet using the procedures found in 14 CFR (8) Installation date and SB revision level Way, Wichita, KS, 67209; phone: (316) 946– 11.43 and 11.45, by any of the following used for installation of the fuel control 2000; email: [email protected]; methods: screws within the engine fuel control in website: https:// • Federal eRulemaking Portal: Go to accordance with Honeywell SB TFE731–73– businessaircraft.bombardier.com/en/aircraft/ https://www.regulations.gov. Follow the 5146 Learjet.html. You may view this referenced instructions for submitting comments. (9) Any failures of fuel control screws after service information at the FAA, • Fax: 202–493–2251. compliance with Honeywell SB TFE731–73– Airworthiness Products Section, Operational • Mail: U.S. Department of 5146. Safety Branch, 901 Locust, Kansas City, MO 64106. For information on the availability of Transportation, Docket Operations, (h) Replacement this material at the FAA, call (816) 329–4148. M–30, West Building Ground Floor, Room W12–140, 1200 New Jersey Within 12 months after the effective date Issued on August 5, 2021. of this AD or 750 hours time-in-service after Avenue SE, Washington, DC 20590. the effective date of this AD, whichever Lance T. Gant, • Hand Delivery: Deliver to Mail occurs first, replace the engine fuel flow Director, Compliance & Airworthiness address above between 9 a.m. and 5 meter bracket in accordance with the Division, Certification Service. p.m., Monday through Friday, except Accomplishment Instructions, paragraphs [FR Doc. 2021–17044 Filed 8–12–21; 8:45 am] Federal holidays. 3.A through 3.C, of the following Bombardier BILLING CODE 4910–13–P For EASA material that will be SB applicable to your airplane model. incorporated by reference (IBR) in this (1) Bombardier SB 40–73–01, AD, contact EASA, Konrad-Adenauer- Revision 1, dated January 9, 2017. DEPARTMENT OF TRANSPORTATION Ufer 3, 50668 Cologne, Germany; (2) Bombardier SB 45–73–2 telephone +49 221 8999 000; email Revision 1, dated January 9, 2017. Federal Aviation Administration (3) Bombardier Learjet 70 SB 70–73–01 [email protected]; internet www.easa.europa.eu. You may find this Revision 1, dated January 9, 2017. 14 CFR Part 39 (4) Bombardier Learjet 75 SB 75–73–01, IBR material on the EASA website at Revision 2, dated January 9, 2017. [Docket No. FAA–2021–0663; Project https://ad.easa.europa.eu. For Identifier MCAI–2020–01618–T] service information identified in this (i) Credit for Previous Actions proposed AD, contact Airbus SAS, RIN 2120–AA64 (1) This paragraph provides credit for the Airworthiness Office—EIAS, Rond- actions required by paragraph (h) of this AD, Airworthiness Directives; Airbus SAS Point Emile Dewoitine No: 2, 31700 if those actions were performed before the Blagnac Cedex, France; telephone +33 5 effective date of this AD using Bombardier Airplanes 61 93 36 96; fax +33 5 61 93 44 51; email Learjet 40 SB 40–73–01, Basic Issue, AGENCY: Federal Aviation Bombardier Learjet 45 Service Bulletin SB [email protected]; 45–73–2, Basic Issue, Bombardier Learjet 70 Administration (FAA), DOT. internet https://www.airbus.com. You SB 70–73–01, Basic Issue, or Bombardier ACTION: Notice of proposed rulemaking may view this IBR material at the FAA, Learjet 75 SB 75–73–01, Basic Issue, all dated (NPRM). Airworthiness Products Section, October 3, 2016, or Bombardier Learjet 75 SB Operational Safety Branch, 2200 South 75–73–01, Revision 1, dated October 10, SUMMARY: The FAA proposes to 216th St., Des Moines, WA. For 2016. supersede Airworthiness Directive (AD) information on the availability of this (2) To take credit for any previous action, 2016–17–12, which applies to all Airbus material at the FAA, call 206–231–3195. you must comply with paragraph (g) of this SAS Model A318 series airplanes; It is also available in the AD docket on AD within 60 days after the effective date of Model A319–111, –112, –113, –114, the internet at https:// this AD. –115, –131, –132, and –133 airplanes; www.regulations.gov by searching for (j) Alternative Methods of Compliance Model A320–211, –212, –214, –231, and locating Docket No. FAA–2021– (AMOCs) –232, and –233 airplanes; and Model 0663. For the UTC Aerospace Systems (1) The Manager, Wichita ACO Branch, A321–111, –112, –131, –211, –212, material identified in this proposed AD FAA, has the authority to approve AMOCs –213, –231, and –232 airplanes. AD that will not be incorporated by for this AD, if requested using the procedures 2016–17–12 requires inspecting certain reference, contact Collins Aerospace, found in 14 CFR 39.19. In accordance with trimmable horizontal stabilizer actuators Product Support Department 13, 14 CFR 39.19, send your request to your (THSAs) to determine the number of Avenue de L’Eguillette—Saint-Ouen principal inspector or local Flight Standards total flight cycles the THSA has L’Aumone, Boite Postale 7186 95056 District Office, as appropriate. If sending accumulated, and replacing the THSA if information directly to the manager of the Cergy Pontoise Cedex, France; necessary. Since the FAA issued AD telephone 1–877–808–7575; email crc@ certification office, send it to the attention of 2016–17–12, the FAA has determined the person identified in Related Information. collins.com; internet https:// (2) Before using any approved AMOC, that new or more restrictive www.collinsaerospace.com/support. airworthiness limitations are necessary. notify your appropriate principal inspector, Examining the AD Docket or lacking a principal inspector, the manager This proposed AD would require of the local flight standards district office/ revising the existing maintenance or You may examine the AD docket on certificate holding district office. inspection program, as applicable, to the internet at https://

VerDate Sep<11>2014 16:19 Aug 12, 2021 Jkt 253001 PO 00000 Frm 00022 Fmt 4702 Sfmt 4702 E:\FR\FM\13AUP1.SGM 13AUP1 jbell on DSKJLSW7X2PROD with PROPOSALS 44664 Federal Register / Vol. 86, No. 154 / Friday, August 13, 2021 / Proposed Rules

www.regulations.gov by searching for should be sent to Sanjay Ralhan, –271N, –272N, and –273N airplanes; and locating Docket No. FAA–2021– Aerospace Engineer, Large Aircraft and Model A321–111, –112, –131, –211, 0663; or in person at Docket Operations Section, International Validation –212, –213, –231, –232, –251N, –251NX, between 9 a.m. and 5 p.m., Monday Branch, FAA, 2200 South 216th St., Des –252N, –252NX, –253N, –253NX, through Friday, except Federal holidays. Moines, WA 98198; telephone and fax –271N, –271NX, –272N, and –272NX The AD docket contains this NPRM, any 206–231–3223; email sanjay.ralhan@ airplanes. Model A320–215 airplanes comments received, and other faa.gov. Any commentary that the FAA are not certificated by the FAA and are information. The street address for receives which is not specifically not included on the U.S. type certificate Docket Operations is listed above. designated as CBI will be placed in the data sheet; this AD therefore does not FOR FURTHER INFORMATION CONTACT: public docket for this rulemaking. include those airplanes in the Sanjay Ralhan, Aerospace Engineer, Background applicability. Large Aircraft Section, International Airplanes with an original The FAA issued AD 2016–17–12, Validation Branch, FAA, 2200 South airworthiness certificate or original Amendment 39–18625 (81 FR 58823, 216th St., Des Moines, WA 98198; export certificate of airworthiness August 26, 2016) (AD 2016–17–12), for telephone and fax 206–231–3223; email issued after October 5, 2020, must all Airbus SAS Model A318 series [email protected]. comply with the airworthiness airplanes; Model A319–111, –112, –113, SUPPLEMENTARY INFORMATION: limitations specified as part of the –114, –115, –131, –132, and –133 approved type design and referenced on Comments Invited airplanes; Model A320–211, –212, –214, the type certificate data sheet. However, –231, –232, and –233 airplanes; and Airbus A318/A319/A320/A321 The FAA invites you to send any Model A321–111, –112, –131, –211, Airworthiness Limitations Section written relevant data, views, or –212, –213, –231, and –232 airplanes. (ALS) Part 4 Variation 7.1 specifies that arguments about this proposal. Send AD 2016–17–12 requires inspecting replacements can be accomplished in your comments to an address listed certain THSAs to determine the number accordance with certain service under ADDRESSES. Include ‘‘Docket No. of total flight cycles the THSA has information, while this proposed AD FAA–2021–0663; Project Identifier accumulated, and replacing the THSA if would require accomplishing those MCAI–2020–01618–T’’ at the beginning necessary. The FAA issued AD 2016– replacements in accordance with certain of your comments. The most helpful 17–12 to address premature wear of the service information. To ensure all comments reference a specific portion of carbon friction disks on the no-back the proposal, explain the reason for any brake (NBB) of the THSA, which could maintenance or inspection programs recommended change, and include lead to reduced braking efficiency in incorporate the revised task, including supporting data. The FAA will consider certain load conditions, and, in the revised replacement requirements, all comments received by the closing conjunction with the inability of the this proposed AD would therefore date and may amend the proposal power gear train to keep the ball screw require all operators to revise their because of those comments. in its last commanded position, could existing maintenance or inspection Except for Confidential Business result in uncommanded movements of program to include either the revised Information (CBI) as described in the the trimmable horizontal stabilizer and task including the revised provisions for following paragraph, and other loss of control of the airplane. replacement, or the revised provisions information as described in 14 CFR for replacement, depending on when the 11.35, the FAA will post all comments Actions Since AD 2016–17–12 Was original airworthiness certificate or received, without change, to https:// Issued original export certificate of www.regulations.gov, including any Since the FAA issued AD 2016–17– airworthiness was issued. personal information you provide. The 12, new investigations determined that EASA AD 2020–0270 specifies that it agency will also post a report the compliance time for removal from requires a task (limitation) already summarizing each substantive verbal service and replacement of certain required by EASA AD 2020–0034, dated contact received about this proposed THSA NBB disks must be reduced. This February 25, 2020 (which corresponds AD. task was required by AD 2016–17–12, to FAA AD 2020–21–10, Amendment and the task and newly reduced 39–21283 (85 FR 65190, October 15, Confidential Business Information compliance time have now been 2020) (AD 2020–21–10)) and invalidates CBI is commercial or financial incorporated into Airbus A318/A319/ (terminates) prior instructions for that information that is both customarily and A320/A321 Airworthiness Limitations task. This proposed AD would terminate actually treated as private by its owner. Section (ALS) Part 4 Variation 7.1, dated the ALS limitation for task 274000– Under the Freedom of Information Act October 5, 2020. The FAA has therefore 00004–1–E for the THSAs, as required (FOIA) (5 U.S.C. 552), CBI is exempt determined that new or more restrictive by paragraph (i) of AD 2020–21–10, for from public disclosure. If your airworthiness limitations are necessary. Model A318–111, –112, –121, and –122 comments responsive to this NPRM EASA, which is the Technical Agent airplanes; Model A319–111, –112, –113, contain commercial or financial for the Member States of the European –114, –115, –131, –132, –133, –151N, information that is customarily treated Union, has issued EASA AD 2020–0270, and –153N airplanes; Model A320–211, as private, that you actually treat as dated December 7, 2020 (EASA AD –212, –214, –216, –231, –232, –233, private, and that is relevant or 2020–0270) (also referred to as the –251N, –252N, –253N, –271N, –272N, responsive to this NPRM, it is important Mandatory Continuing Airworthiness and –273N airplanes; and Model A321– that you clearly designate the submitted Information, or the MCAI), to correct an 111, –112, –131, –211, –212, –213, –231, comments as CBI. Please mark each unsafe condition for all Airbus SAS –232, –251N, –251NX, –252N, –252NX, page of your submission containing CBI Model A318–111, –112, –121, and –122 –253N, –253NX, –271N, –271NX, as ‘‘PROPIN.’’ The FAA will treat such airplanes; Model A319–111, –112, –113, –272N, and –272NX airplanes; with an marked submissions as confidential –114, –115, –131, –132, –133, –151N, original airworthiness certificate or under the FOIA, and they will not be –153N, and –171N airplanes; Model original export certificate of placed in the public docket of this A320–211, –212, –214, –216, –231, airworthiness issued on or before NPRM. Submissions containing CBI –232, –233, –251N, –252N, –253N, November 7, 2019, only.

VerDate Sep<11>2014 16:19 Aug 12, 2021 Jkt 253001 PO 00000 Frm 00023 Fmt 4702 Sfmt 4702 E:\FR\FM\13AUP1.SGM 13AUP1 jbell on DSKJLSW7X2PROD with PROPOSALS Federal Register / Vol. 86, No. 154 / Friday, August 13, 2021 / Proposed Rules 44665

This proposed AD was prompted by FAA’s Determination and Requirements Using common terms that are the same a determination that new or more of This Proposed AD as the heading of a particular section in restrictive airworthiness limitations are This product has been approved by EASA AD 2020–0270 does not mean necessary. The FAA is proposing this the aviation authority of another that operators need comply only with AD to address premature wear of the country, and is approved for operation that section. For example, where the AD carbon friction disks on the NBB of the in the United States. Pursuant to the requirement refers to ‘‘all required THSA, which could lead to reduced FAA’s bilateral agreement with the State actions and compliance times,’’ braking efficiency in certain load of Design Authority, the FAA has been compliance with this AD requirement is conditions, and, in conjunction with the notified of the unsafe condition not limited to the section titled inability of the power gear train to keep described in the MCAI and service ‘‘Required Action(s) and Compliance the ball screw in its last commanded information referenced above. The FAA Time(s)’’ in EASA AD 2020–0270. position, could result in uncommanded is proposing this AD because the FAA Service information required by EASA movements of the trimmable horizontal has evaluated all pertinent information AD 2020–0270 for compliance will be stabilizer and loss of control of the and determined an unsafe condition available at https://www.regulations.gov airplane. See the MCAI for additional exists and is likely to exist or develop by searching for and locating Docket No. background information. on other products of the same type FAA–2021–0663 after the FAA final rule is published. Model A320–216 Airplanes design. Proposed AD Requirements Airworthiness Limitation ADs Using The Airbus SAS Model A320–216 was the New Process U.S. type certificated on December 19, This proposed AD would retain the requirements of AD 2016–17–12. This The FAA’s process of incorporating 2016. Before that date, any EASA ADs by reference MCAI ADs as the primary that affected Model A320–216 airplanes proposed AD would also require revising the existing maintenance or source of information for compliance were included in the U.S. type with corresponding FAA ADs has been certificate as part of the Required inspection program, as applicable, to incorporate new or more restrictive limited to certain MCAI ADs (primarily Airworthiness Actions List (RAAL). One those with service bulletins as the or more Model A320–216 airplanes have airworthiness limitations, which are specified in EASA AD 2020–0270 primary source of information for subsequently been placed on the U.S. accomplishing the actions required by Register, and will now be included in described previously, as proposed for incorporation by reference. Any the FAA AD). However, the FAA is now FAA AD actions. For Model A320–216 expanding the process to include MCAI airplanes, the requirements that differences with EASA AD 2020–0270 are identified as exceptions in the ADs that require a change to correspond to AD 2016–17–12 were airworthiness limitation documents, mandated by the MCAI via the RAAL. regulatory text of this AD. This proposed AD would require such as airworthiness limitation Although that RAAL requirement is still revisions to certain operator sections. in effect, for continuity and clarity the maintenance documents to include new For these ADs that incorporate by FAA has identified Model A320–216 actions (e.g., inspections). Compliance reference an MCAI AD that changes airplanes in paragraph (c) of this with these actions is required by 14 CFR airworthiness limitations, the FAA proposed AD; the MCAI that is specified 91.403(c). For airplanes that have been requirements are unchanged. Operators in paragraph (l) in this proposed AD previously modified, altered, or repaired must revise the existing maintenance or includes restated requirements, which in the areas addressed by this proposed inspection program, as applicable, to would therefore apply to those AD, the operator may not be able to incorporate the information specified in airplanes. accomplish the actions described in the the new airworthiness limitation Related Service Information Under 1 revisions. In this situation, to comply document. The airworthiness CFR Part 51 with 14 CFR 91.403(c), the operator limitations must be followed according must request approval for an alternative to 14 CFR 91.403(c) and 91.409(e). EASA AD 2020–0270 describes new method of compliance according to The previous format of the or more restrictive airworthiness paragraph (p)(1) of this proposed AD. airworthiness limitation ADs included a limitations for airplane structures and paragraph that specified that no safe life limits. Explanation of Required Compliance alternative actions (e.g., inspections) or Information Airbus A318/A319/A320/A321 intervals may be used unless the actions Airworthiness Limitations Section In the FAA’s ongoing efforts to or intervals are approved as an (ALS) Part 4 Variation 7.1, dated improve the efficiency of the AD alternative method of compliance October 5, 2020, describes a task for process, the FAA developed a process to (AMOC) in accordance with the removal from service and replacement use certain civil aviation authority procedures specified in the AMOCs of certain THSA NBB disks. (CAA) ADs as the primary source of paragraph under ‘‘Other FAA information for compliance with Provisions.’’ This new format includes a This proposed AD would also require requirements for corresponding FAA ‘‘New Provisions for Alternative Actions Airbus Service Bulletin A320–27–1242, ADs. The FAA has been coordinating and Intervals’’ paragraph that does not Revision 01, dated February 4, 2016, this process with manufacturers and specifically refer to AMOCs, but which the Director of the Federal CAAs. As a result, the FAA proposes to operators may still request an AMOC to Register approved for incorporation by incorporate EASA AD 2020–0270 by use an alternative actions or intervals. reference as of September 30, 2016 (81 reference in the FAA final rule. This FR 58823, August 26, 2016). proposed AD would, therefore, require Costs of Compliance This material is reasonably available compliance with EASA AD 2020–0270 The FAA estimates that this proposed because the interested parties have in its entirety through that AD affects 1,630 airplanes of U.S. access to it through their normal course incorporation, except for any differences registry. The FAA estimates the of business or by the means identified identified as exceptions in the following costs to comply with this in the ADDRESSES section. regulatory text of this proposed AD. proposed AD:

VerDate Sep<11>2014 16:19 Aug 12, 2021 Jkt 253001 PO 00000 Frm 00024 Fmt 4702 Sfmt 4702 E:\FR\FM\13AUP1.SGM 13AUP1 jbell on DSKJLSW7X2PROD with PROPOSALS 44666 Federal Register / Vol. 86, No. 154 / Friday, August 13, 2021 / Proposed Rules

ESTIMATED COSTS FOR REQUIRED ACTIONS *

Cost per Cost on U.S. Action Labor cost Parts cost product operators

Retained actions from AD 2016–17–12 (959 airplanes) 1 work-hour × $85 per hour = $85 .. $0 $85 $81,515 * Table does not include estimated costs for reporting/revising the existing maintenance or inspection program.

The FAA has determined that revising affected fleet(s), the FAA has The FAA estimates the following the existing maintenance or inspection determined that a per-operator estimate costs to do any necessary on-condition program takes an average of 90 work- is more accurate than a per-airplane actions that would be required based on hours per operator, although the agency estimate. the results of any required actions. The recognizes that this number may vary The FAA estimates the total cost per FAA has no way of determining the from operator to operator. Since operator for the new proposed actions to number of aircraft that might need this × operators incorporate maintenance or be $7,650 (90 work-hours $85 per on-condition action: inspection program changes for their work-hour).

ESTIMATED COSTS OF ON-CONDITION ACTIONS

Cost per Labor cost Parts cost product

21 work-hours × $85 per hour = $1,785 ...... $26,500 $28,285

Authority for This Rulemaking (3) Would not have a significant (2) This AD affects AD 2020–21–10, economic impact, positive or negative, Amendment 39–21283 (85 FR 65190, October Title 49 of the United States Code on a substantial number of small entities 15, 2020) (AD 2020–21–10). specifies the FAA’s authority to issue under the criteria of the Regulatory rules on aviation safety. Subtitle I, (c) Applicability Flexibility Act. section 106, describes the authority of This AD applies to all Airbus SAS the FAA Administrator. Subtitle VII: List of Subjects in 14 CFR Part 39 airplanes, certificated in any category, Aviation Programs, describes in more identified in paragraphs (c)(1) through (7) of detail the scope of the Agency’s Air transportation, Aircraft, Aviation this AD. authority. safety, Incorporation by reference, (1) Model A318–111, –112, –121, and –122 Safety. The FAA is issuing this rulemaking airplanes. under the authority described in The Proposed Amendment (2) Model A319–111, –112, –113, –114, Subtitle VII, Part A, Subpart III, Section –115, –131, –132, and –133 airplanes. 44701: General requirements. Under Accordingly, under the authority (3) Model A320–211, –212, –214, –216, that section, Congress charges the FAA delegated to me by the Administrator, –231, –232, and –233 airplanes. with promoting safe flight of civil the FAA proposes to amend 14 CFR part (4) Model A321–111, –112, –131, –211, aircraft in air commerce by prescribing 39 as follows: –212, –213, –231, and –232 airplanes. (5) Model A319–151N, –153N, and –171N regulations for practices, methods, and PART 39—AIRWORTHINESS procedures the Administrator finds airplanes. DIRECTIVES (6) Model A320–251N, –252N, –253N, necessary for safety in air commerce. –271N, –272N, and –273N airplanes. This regulation is within the scope of ■ 1. The authority citation for part 39 (7) Model A321–251N, –251NX, –252N, that authority because it addresses an continues to read as follows: –252NX, –253N, –253NX, –271N, –271NX, unsafe condition that is likely to exist or –272N, and –272NX airplanes. develop on products identified in this Authority: 49 U.S.C. 106(g), 40113, 44701. (d) Subject rulemaking action. § 39.13 [Amended] Regulatory Findings Air Transport Association (ATA) of ■ 2. The FAA amends § 39.13 by: America Code 05, Time Limits/Maintenance The FAA determined that this ■ a. Removing Airworthiness Directive Checks; 27, Flight Controls. proposed AD would not have federalism (AD) 2016–17–12, Amendment 39– (e) Reason implications under Executive Order 18625 (81 FR 58823, August 26, 2016); 13132. This proposed AD would not and This AD was prompted by a determination that new or more restrictive airworthiness have a substantial direct effect on the ■ b. Adding the following new AD: States, on the relationship between the limitations are necessary. The FAA is issuing national Government and the States, or Airbus SAS: Docket No. FAA–2021–0663; this AD to address premature wear of the on the distribution of power and Project Identifier MCAI–2020–01618–T. carbon friction disks on the no-back brake responsibilities among the various (a) Comments Due Date (NBB) of the trimmable horizontal stabilizer actuator (THSA), which could lead to levels of government. The FAA must receive comments on this reduced braking efficiency in certain load airworthiness directive (AD) by September For the reasons discussed above, I conditions, and, in conjunction with the 27, 2021. certify this proposed regulation: inability of the power gear train to keep the (1) Is not a ‘‘significant regulatory (b) Affected ADs ball screw in its last commanded position, action’’ under Executive Order 12866, (1) This AD replaces AD 2016–17–12, could result in uncommanded movements of (2) Would not affect intrastate Amendment 39–18625 (81 FR 58823, August the trimmable horizontal stabilizer and loss aviation in Alaska, and 26, 2016) (AD 2016–17–12). of control of the airplane.

VerDate Sep<11>2014 16:19 Aug 12, 2021 Jkt 253001 PO 00000 Frm 00025 Fmt 4702 Sfmt 4702 E:\FR\FM\13AUP1.SGM 13AUP1 jbell on DSKJLSW7X2PROD with PROPOSALS Federal Register / Vol. 86, No. 154 / Friday, August 13, 2021 / Proposed Rules 44667

(f) Compliance exceeded on each date the corresponding 2020 (EASA AD 2020–0270). Accomplishing Comply with this AD within the number of flight cycles specified in the maintenance or inspection program compliance times specified, unless already paragraphs (g)(1) through (5) of this AD. Do revision required by this paragraph done. the replacement in accordance with the terminates the requirements of paragraphs Accomplishment Instructions of Airbus (g), (h), and (j) of this AD. (g) Retained Inspection To Determine THSA Service Bulletin A320–27–1242, Revision 01, (2) For the airplanes identified in Part Number and Accumulated Total Flight dated February 4, 2016. Affected THSAs paragraph (c) of this AD with an original Cycles, With No Changes must be replaced with serviceable THSAs. airworthiness certificate or original export This paragraph restates the requirements of (2) As of each date specified in paragraphs certificate of airworthiness issued after paragraph (g) of AD 2016–17–12, with no (g)(1) through (5) of this AD, and before October 5, 2020, revise the existing changes. For airplanes identified in exceeding the flight cycle limit maintenance or inspection program, as paragraphs (c)(1) through (4) of this AD: No corresponding to each date, as applicable: applicable, to incorporate the provision later than each date specified in paragraphs Replace each THSA with a serviceable specified in paragraph (m)(7) of this AD. THSA, in accordance with the (g)(1) through (5) of this AD, inspect the (m) Exceptions to EASA AD 2020–0270 THSA to determine if it has a part number Accomplishment Instructions of Airbus (1) Where EASA AD 2020–0270 refers to its (P/N) 47145–(XXX), and, if any THSA P/N Service Bulletin A320–27–1242, Revision 01, effective date, this AD requires using the 47145–(XXX) is found, determine the total dated February 4, 2016. effective date of this AD. number of flight cycles accumulated since (i) Retained Definition of Serviceable THSA, (2) The requirements specified in the THSA’s first installation on an airplane, With No Changes paragraphs (1) and (2) of EASA AD 2020– or since the most recent NBB replacement, 0270 do not apply to this AD. whichever is later. A review of airplane This paragraph restates the definition of (3) Paragraph (3) of EASA AD 2020–0270 delivery or maintenance records is acceptable paragraph (i) of AD 2016–17–12, with no specifies revising ‘‘the approved AMP’’ in lieu of this inspection if the part number changes. For airplanes identified in within 12 months after its effective date, but of the THSA can be conclusively determined paragraphs (c)(1) through (4) of this AD: For this AD requires revising the existing from that review. In case maintenance the purposes of this AD, a serviceable THSA maintenance or inspection program, as records concerning the most recent NBB disk is a THSA that has not exceeded the applicable, within 90 days after the effective replacement are unavailable or incomplete, applicable flight-cycle limits, as specified date of this AD. the total flight cycles accumulated since first paragraphs (g)(1) through (5) of this AD, since (4) The initial compliance time for doing installation of the THSA on an airplane first installation of the THSA on an airplane the tasks specified in paragraph (3) of EASA apply. Accomplishing the maintenance or or since last NBB replacement, whichever is AD 2020–0270 is at the applicable inspection program revision required by later. ‘‘thresholds’’ as incorporated by the paragraph (l) of this AD terminates the Note 1 to paragraph (i): Guidance for NBB requirements of paragraph (3) of EASA AD requirements of this paragraph. disk replacement can be found in UTC 2020–0270, or within 90 days after the (1) As of September 30, 2016 (the effective Aerospace Systems Service Bulletin 47145– effective date of this AD, whichever occurs date of AD 2016–17–12): The THSA flight- 27–17, Revision 1, dated July 21, 2015. later. cycle limit (since first installation on an (5) The provisions specified in paragraph airplane, or since the most recent NBB (j) Retained Parts Installation Limitation, (4) of EASA AD 2020–0270 do not apply to replacement, whichever is later) is 40,000 With No Changes this AD. total flight cycles. This paragraph restates the provisions of (6) The ‘‘Remarks’’ section of EASA AD (2) As of December 31, 2016: The THSA paragraph (j) of AD 2016–17–12, with no 2020–0270 does not apply to this AD. flight-cycle limit (since first installation on changes. For airplanes identified in (7) For all airplanes identified in paragraph an airplane, or since the most recent NBB paragraphs (c)(1) through (4) of this AD: As (c) of this AD: Where Note 1 in the service replacement, whichever is later) is 36,000 of each date specified in paragraphs (g)(1) information referenced in EASA AD 2020– total flight cycles. through (5) of this AD, as applicable, only 0270 specifies ‘‘NBB carbon disc replacement (3) As of December 31, 2017: The THSA installation of a serviceable THSA P/N can be accomplished in accordance with SB flight-cycle limit (since first installation on 47145–(XXX) is allowed on an airplane. A320–27–1242 or VSB 47145–27–17,’’ for an airplane, or since the most recent NBB Accomplishing the maintenance or this AD use ‘‘NBB carbon disk replacement replacement, whichever is later) is 33,600 inspection program revision required by must be accomplished in accordance with SB total flight cycles. paragraph (l) of this AD terminates the A320–27–1242.’’ (4) As of December 31, 2018: The THSA requirements of this paragraph. flight-cycle limit (since first installation on (n) New Provisions for Alternative Actions an airplane, or since the most recent NBB (k) Retained Credit for Previous Actions, and Intervals With No Changes replacement, whichever is later) is 31,600 After the existing maintenance or total flight cycles. This paragraph restates the requirements of inspection program has been revised as (5) As of December 31, 2019: The THSA paragraph (k) of AD 2016–17–12, with no required by paragraph (l) of this AD, no flight-cycle limit (since first installation on changes. For airplanes identified in alternative actions (e.g., inspections) or an airplane, or since the most recent NBB paragraphs (c)(1) through (4) of this AD: This intervals are allowed unless they are replacement, whichever is later) is 30,000 paragraph provides credit for actions approved as specified in the provisions of the total flight cycles. required by paragraph (h) of this AD, if those ‘‘Ref. Publications’’ section of EASA AD actions were performed before September 30, 2020–0270. (h) Retained Replacements, With No 2016 (the effective date of AD 2016–17–12), Changes using Airbus Service Bulletin A320–27–1242, (o) Terminating Action for Certain This paragraph restates the requirements of dated February 9, 2015. Requirements of AD 2020–21–10 paragraph (h) of AD 2016–17–12, with no Accomplishing the actions required by this changes. For airplanes identified in (l) New Maintenance or Inspection Program AD terminates the ALS limitation task paragraphs (c)(1) through (4) of this AD: For Revision 274000–00004–1–E for the THSA, as required airplanes with any THSA P/N 47145–(XXX), (1) For the airplanes identified in by paragraph (i) of AD 2020–21–10, for do the replacements required by paragraphs paragraph (c) of this AD with an original Model A318–111, –112, –121, and –122 (h)(1) and (2) of this AD. Accomplishing the airworthiness certificate or original export airplanes; Model A319–111, –112, –113, maintenance or inspection program revision certificate of airworthiness issued on or –114, –115, –131, –132, –133, –151N, and required by paragraph (l) of this AD before October 5, 2020, except as specified in –153N airplanes; Model A320–211, –212, terminates the requirements of this paragraph (m) of this AD: Comply with all –214, –216, –231, –232, –233, –251N, –252N, paragraph. required actions and compliance times –253N, –271N, –272N, and –273N airplanes; (1) No later than each date specified in specified in, and in accordance with, and Model A321–111, –112, –131, –211, paragraphs (g)(1) through (5) of this AD, European Union Aviation Safety Agency –212, –213, –231, –232, –251N, –251NX, replace all THSA that have reached or (EASA) AD 2020–0270, dated December 7, –252N, –252NX, –253N, –253NX, –271N,

VerDate Sep<11>2014 16:19 Aug 12, 2021 Jkt 253001 PO 00000 Frm 00026 Fmt 4702 Sfmt 4702 E:\FR\FM\13AUP1.SGM 13AUP1 jbell on DSKJLSW7X2PROD with PROPOSALS 44668 Federal Register / Vol. 86, No. 154 / Friday, August 13, 2021 / Proposed Rules

–271NX, –272N, and –272NX airplanes; with (3) For UTC Aerospace Systems material 800–647–5527, or (202) 366–9826. You an original airworthiness certificate or identified in this proposed AD, contact must identify FAA Docket No. FAA– original export certificate of airworthiness Collins Aerospace, Product Support 2021–0637; Airspace Docket No. 21– issued on or before November 7, 2019, only. Department 13, Avenue de L’Eguillette— ANM–31, at the beginning of your Saint-Ouen L’Aumone, Boite Postale 7186 (p) Other FAA AD Provisions 95056 Cergy Pontoise Cedex, France; comments. You may also submit The following provisions also apply to this telephone 1–877–808–7575; email crc@ comments through the internet at AD: collins.com; internet https:// https://www.regulations.gov. (1) Alternative Methods of Compliance www.collinsaerospace.com/support. FAA Order 7400.11E, Airspace (AMOCs): The Manager, Large Aircraft (4) You may view this material at the FAA, Designations and Reporting Points, and Section, International Validation Branch, Airworthiness Products Section, Operational subsequent amendments can be viewed FAA, has the authority to approve AMOCs Safety Branch, 2200 South 216th St., Des online at https://www.faa.gov/air_ for this AD, if requested using the procedures Moines, WA. For information on the traffic/publications/. For further found in 14 CFR 39.19. In accordance with availability of this material at the FAA, call information, you can contact the 14 CFR 39.19, send your request to your 206–231–3195. This material may be found principal inspector or responsible Flight in the AD docket on the internet at https:// Airspace Policy Group, Federal Aviation Standards Office, as appropriate. If sending www.regulations.gov by searching for and Administration, 800 Independence information directly to the Large Aircraft locating Docket No. FAA–2021–0663. Avenue SW, Washington, DC 20591; Section, International Validation Branch, (5) For more information about this AD, telephone: (202) 267–8783. The Order is send it to the attention of the person contact Sanjay Ralhan, Aerospace Engineer, also available for inspection at the identified in paragraph (q)(4) of this AD. Large Aircraft Section, International National Archives and Records Information may be emailed to: 9-AVS-AIR- Validation Branch, FAA, 2200 South 216th Administration (NARA). For [email protected]. St., Des Moines, WA 98198; telephone and information on the availability of FAA (i) Before using any approved AMOC, fax 206–231–3223; email sanjay.ralhan@ Order 7400.11E at NARA, email notify your appropriate principal inspector, faa.gov. or lacking a principal inspector, the manager [email protected] or go to https:// of the responsible Flight Standards Office. Issued on August 5, 2021. www.archives.gov/federal-register/cfr/ (ii) AMOCs approved previously for AD Lance T. Gant, ibr-locations.html. 2016–17–12 are approved as AMOCs for the Director, Compliance & Airworthiness FOR FURTHER INFORMATION CONTACT: corresponding provisions of EASA AD 2020– Division, Aircraft Certification Service. Matthew Van Der Wal, Federal Aviation 0270 that are required by paragraph (l) of this [FR Doc. 2021–17091 Filed 8–12–21; 8:45 am] Administration, Western Service Center, AD. BILLING CODE 4910–13–P (2) Contacting the Manufacturer: For any Operations Support Group, 2200 S. requirement in this AD to obtain instructions 216th Street, Des Moines, WA 98198; from a manufacturer, the instructions must telephone (206) 231–3695. DEPARTMENT OF TRANSPORTATION be accomplished using a method approved SUPPLEMENTARY INFORMATION: by the Manager, Large Aircraft Section, International Validation Branch, FAA; or Federal Aviation Administration Authority for This Rulemaking EASA; or Airbus SAS’s EASA Design 14 CFR Part 71 The FAA’s authority to issue rules Organization Approval (DOA). If approved by regarding aviation safety is found in the DOA, the approval must include the [Docket No. FAA–2021–0637; Airspace Title 49 of the United States Code. DOA-authorized signature. Docket No. 21–ANM–31] (3) Required for Compliance (RC): Except Subtitle I, Section 106 describes the as required by paragraph (p)(2) of this AD, if RIN 2120–AA66 authority of the FAA Administrator. any service information contains procedures Subtitle VII, Aviation Programs, or tests that are identified as RC, those Proposed Establishment Class E describes in more detail the scope of the procedures and tests must be done to comply Airspace; Portland-Troutdale Airport, agency’s authority. This rulemaking is with this AD; any procedures or tests that are OR promulgated under the authority not identified as RC are recommended. Those described in Subtitle VII, Part A, procedures and tests that are not identified AGENCY: Federal Aviation Subpart I, Section 40103. Under that as RC may be deviated from using accepted Administration (FAA), DOT. section, the FAA is charged with methods in accordance with the operator’s ACTION: Notice of proposed rulemaking maintenance or inspection program without prescribing regulations to assign the use obtaining approval of an AMOC, provided (NPRM). of airspace necessary to ensure the the procedures and tests identified as RC can safety of aircraft and the efficient use of SUMMARY: This action proposes to be done and the airplane can be put back in airspace. This regulation is within the establish Class E airspace, designated as an airworthy condition. Any substitutions or scope of that authority, as it would an extension to a Class D or Class E changes to procedures or tests identified as establish Class E airspace at Portland- surface area, at Portland-Troutdale RC require approval of an AMOC. Troutdale Airport, Portland, OR, to Airport, Portland, OR. This action also support IFR operations at the airport. (q) Related Information proposes numerous administrative (1) For EASA AD 2020–0270, contact updates to the Class D and Class E2 text Comments Invited EASA, Konrad-Adenauer-Ufer 3, 50668 headers and airspace descriptions. This Interested parties are invited to Cologne, Germany; telephone +49 221 8999 action would ensure the safety and 000; email [email protected]; internet participate in this proposed rulemaking www.easa.europa.eu. You may find this management of instrument flight rules by submitting such written data, views, EASA AD on the EASA website at https:// (IFR) operations at the airport. or arguments, as they may desire. ad.easa.europa.eu. DATES: Comments must be received on Comments that provide the factual basis (2) For Airbus service information or before September 27, 2021. supporting the views and suggestions identified in this proposed AD, contact ADDRESSES: Send comments on this presented are particularly helpful in Airbus SAS, Airworthiness Office—EIAS, Rond-Point Emile Dewoitine No: 2, 31700 proposal to the U.S. Department of developing reasoned regulatory Blagnac Cedex, France; telephone +33 5 61 Transportation, Docket Operations, 1200 decisions on the proposal. Comments 93 36 96; fax +33 5 61 93 44 51; email New Jersey Avenue SE, West Building are specifically invited on the overall [email protected]; internet Ground Floor, Room W12–140, regulatory, aeronautical, economic, https://www.airbus.com. Washington, DC 20590; telephone: 1– environmental, and energy-related

VerDate Sep<11>2014 16:19 Aug 12, 2021 Jkt 253001 PO 00000 Frm 00027 Fmt 4702 Sfmt 4702 E:\FR\FM\13AUP1.SGM 13AUP1 jbell on DSKJLSW7X2PROD with PROPOSALS