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(c) From subsection (e)(1) (Relevancy and DEPARTMENT OF TRANSPORTATION www.regulations.gov by searching for Necessity of Information) because in the and locating Docket No. FAA–2018– course of investigations into potential Federal Aviation Administration 0327; or in person at Docket Operations violations of federal law, the accuracy of between 9 a.m. and 5 p.m., Monday information obtained or introduced 14 CFR Part 39 through Friday, except Federal holidays. occasionally may be unclear, or the The AD docket contains this NPRM, the information may not be strictly relevant or [Docket No. FAA–2018–0327; Product Identifier 2018–CE–001–AD] regulatory evaluation, any comments necessary to a specific investigation. In the received, and other information. The interests of effective law enforcement, it is RIN 2120–AA64 street address for Docket Operations appropriate to retain all information that may aid in establishing patterns of unlawful Airworthiness Directives; , Inc. (phone: 800–647–5527) is listed above. activity. Airplanes Comments will be available in the AD (d) From subsection (e)(2) (Collection of docket shortly after receipt. Information from Individuals) because AGENCY: Federal Aviation FOR FURTHER INFORMATION CONTACT: Tara requiring that information be collected from Administration (FAA), DOT. Shawn, Aerospace Engineer, Wichita the subject of an investigation would alert the ACTION: Notice of proposed rulemaking ACO Branch, 1801 Airport Road, Room subject to the nature or existence of the (NPRM). 100, Wichita, Kansas 67209; telephone: investigation, thereby interfering with that (316) 946–4141; fax: (316) 946–4107; investigation and related law enforcement SUMMARY: We propose to adopt a new email: [email protected] or Wichita- activities. airworthiness directive (AD) for certain [email protected]. (e) From subsection (e)(3) (Notice to Learjet, Inc. Models 28, 29, 31, 31A, 35, Subjects) because providing such detailed 35A, 36, 36A, 55, 55B, 55C, and 60 SUPPLEMENTARY INFORMATION: information could impede law enforcement airplanes. This proposed AD was Comments Invited by compromising the existence of a prompted by fatigue cracks initiating in confidential investigation or reveal the the flap support structure due to We invite you to send any written identity of witnesses or confidential repetitive flap loads, which has caused relevant data, views, or arguments about informants. this proposal. Send your comments to (f) From subsections (e)(4)(G), (e)(4)(H), flap nose roller support bracket failure. an address listed under the ADDRESSES (e)(4)(I), (Agency Requirements) and (f) This proposed AD would require section. Include ‘‘Docket No. FAA– (Agency Rules), because portions of this replacement of the flap nose roller system are exempt from the individual access fitting, nose roller support bracket, and 2018–0327; Product Identifier 2018–CE– provisions of subsection (d) for the reasons adjacent rib support structure with more 001–AD’’ at the beginning of your noted above, and therefore DHS is not robust components. We are proposing comments. We specifically invite required to establish requirements, rules, or this AD to address the unsafe condition comments on the overall regulatory, procedures with respect to such access. on these products. economic, environmental, and energy Providing notice to individuals with respect DATES: We must receive comments on aspects of this NPRM. We will consider to existence of records pertaining to them in this proposed AD by June 22, 2018. all comments received by the closing the system of records or otherwise setting up date and may amend this NPRM ADDRESSES: procedures pursuant to which individuals You may send comments, because of those comments. using the procedures found in 14 CFR may access and view records pertaining to We will post all comments we themselves in the system would undermine 11.43 and 11.45, by any of the following methods: receive, without change, to http:// investigative efforts and reveal the identities www.regulations.gov, including any of witnesses, and potential witnesses, and • Federal eRulemaking Portal: Go to confidential informants. http://www.regulations.gov. Follow the personal information you provide. We (g) From subsection (e)(5) (Collection of instructions for submitting comments. will also post a report summarizing each Information) because with the collection of • Fax: 202–493–2251. substantive verbal contact we receive information for law enforcement purposes, it • Mail: U.S. Department of about this NPRM. is impossible to determine in advance what Transportation, Docket Operations, M– Discussion information is accurate, relevant, timely, and 30, West Building Ground Floor, Room complete. Compliance with subsection (e)(5) W12–140, 1200 New Jersey Avenue SE, We received a report of skewed flap would preclude DHS agents from using their Washington, DC 20590. and aileron binding due to fatigue investigative training and exercise of good • Hand Delivery: Deliver to Mail cracks in the flap support structure judgment to both conduct and report on address above between 9 a.m. and 5 caused by repetitive flap loads on a investigations. p.m., Monday through Friday, except Learjet, Inc. Model 31A. As of June (h) From subsection (e)(8) (Notice on 2017, cracks in the flap support Individuals) because compliance would Federal holidays. For service information identified in structure were reported (due to Alert interfere with DHS’s ability to obtain, serve, Service Bulletins published in March and issue subpoenas, warrants, and other law this NPRM, contact Learjet, Inc., One 2017) on Models 31, 31A, 35A, 55, and enforcement mechanisms that may be filed Learjet Way, Wichita, Kansas 67209; under seal and could result in disclosure of telephone: 316–946–2000; email: ac.ict@ 60 airplanes. Repetitive flap loads occur investigative techniques, procedures, and aero.bombardier.com; internet: https:// on all models identified by this evidence. www.bombardier.com. You may view proposed AD. Failure of the flap nose (i) From subsection (g) (Civil Remedies) to this service information at the FAA, roller support bracket allows skewed the extent that the system is exempt from Policy and Innovation Division, 901 flap and aileron binding, which can other specific subsections of the Privacy Act. Locust, Kansas City, Missouri 64106. cause loss of roll control on approach. * * * * * For information on the availability of This condition, if not addressed, could result in loss of control. Philip S. Kaplan this material at the FAA, call (816) 329– 4148. Although there have been no reports Chief Privacy Officer, Department of of cracks on the Models 28, 29, 35, 36, Homeland Security. Examining the AD Docket 36A, 55B, and 55C airplanes, these [FR Doc. 2018–09906 Filed 5–7–18; 8:45 am] You may examine the AD docket on airplanes do incorporate the same BILLING CODE 9111–28–P the internet at http:// design flap support structure.

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Related Service Information service information is reasonably Differences Between This Proposed AD Under 1 CFR Part 51 available because the interested parties and the Service Information We reviewed Bombardier / have access to it through their normal The published service information 29 Service Bulletin (SB) 28/29–27–31 course of business or by the means does not list Models 31A, 35A, 36A, Recommended, dated September 11, identified in the ADDRESSES section. 55B, or 55C as affected models. 2017; Bombardier SB 31–27– FAA’s Determination However, the serial numbers in the 35 Recommended, dated September 11, service information does reflect these 2017; Bombardier /36 SB 35/ We are proposing this AD because we models. The serial numbers in the 36 -27–50 Recommended, dated evaluated all the relevant information service information (except for Models September 11, 2017; Bombardier Learjet and determined the unsafe condition 28/29) does not start with –001, but the 55 SB 55–27–41 Recommended, dated described previously is likely to exist or effectivity in this AD starts with –001 September 11, 2017; and Bombardier develop in other products of the same for all models. The service information SB 60–27–39 Recommended, type design. for all models also specifies to submit a Revision 1, dated January 15, 2018. For compliance response form to the the applicable models, the service Proposed AD Requirements manufacturer; however, this AD does information describes procedures for not require that action. replacement of the flap nose roller This proposed AD would require Costs of Compliance fitting, nose roller support bracket, and accomplishing the actions specified in adjacent rib support structure with the service information described We estimate that this proposed AD improved components. The service previously. affects 706 airplanes of U.S. registry. information also contains instructions to We estimate the following costs to ensure correct flap alignment. This comply with this proposed AD:

ESTIMATED COSTS

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

Replacement of flap nose roller fitting, nose roller support 188 work-hours × $85 per $12,213 $28,193 $19,904,258 bracket, and adjacent rib support structure with improved hour = $15,980. components. * Parts cost is an average of the composite costs for replacement of all of the kits per airplane. Not all airplanes will need all kits, as credit is allowed for some previous installations.

INDIVIDUAL PARTS COST * the Administrator finds necessary for For the reasons discussed above, I safety in air commerce. This regulation certify this proposed regulation: Kit No. (K/N) Part cost is within the scope of that authority (1) Is not a ‘‘significant regulatory because it addresses an unsafe condition action’’ under Executive Order 12866, K/N 2381000–802 ...... $827 that is likely to exist or develop on K/N 2381000–804 ...... 822 (2) Is not a ‘‘significant rule’’ under products identified in this rulemaking K/N 2381000–806 ...... 780 the DOT Regulatory Policies and action. K/N 2381000–808 ...... 793 Procedures (44 FR 11034, February 26, K/N 2381000–809 ...... 1,358 This AD is issued in accordance with 1979), K/N 2381000–810 ...... 1,358 authority delegated by the Executive (3) Will not affect intrastate aviation K/N 2381000–811 ...... 1,822 Director, Aircraft Certification Service, in Alaska, and K/N 2381000–817 ...... 1,674 as authorized by FAA Order 8000.51C. K/N 2381000–818 ...... 1,432 In accordance with that order, issuance (4) Will not have a significant K/N 2381000–819 ...... 1,415 economic impact, positive or negative, K/N 2381000–820 ...... 1,912 of ADs is normally a function of the K/N 2381000–821 ...... 1,912 Compliance and Airworthiness on a substantial number of small entities Division, but during this transition under the criteria of the Regulatory * Parts required for replacement may vary Flexibility Act. for different models and different airplanes. period, the Executive Director has delegated the authority to issue ADs List of Subjects in 14 CFR Part 39 Authority for This Rulemaking applicable to small airplanes, gliders, Title 49 of the United States Code balloons, airships, domestic Air transportation, Aircraft, Aviation specifies the FAA’s authority to issue transport airplanes, and associated safety, Incorporation by reference, rules on aviation safety. Subtitle I, appliances to the Director of the Policy Safety. section 106, describes the authority of and Innovation Division. The Proposed Amendment the FAA Administrator. Subtitle VII: Regulatory Findings Aviation Programs, describes in more Accordingly, under the authority detail the scope of the Agency’s We determined that this proposed AD delegated to me by the Administrator, authority. would not have federalism implications the FAA proposes to amend 14 CFR part We are issuing this rulemaking under under Executive Order 13132. This 39 as follows: the authority described in Subtitle VII, proposed AD would not have a Part A, Subpart III, Section 44701: substantial direct effect on the States, on PART 39—AIRWORTHINESS ‘‘General requirements.’’ Under that the relationship between the national DIRECTIVES section, Congress charges the FAA with government and the States, or on the promoting safe flight of civil aircraft in distribution of power and ■ 1. The authority citation for part 39 air commerce by prescribing regulations responsibilities among the various continues to read as follows: for practices, methods, and procedures levels of government. Authority: 49 U.S.C. 106(g), 40113, 44701.

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§ 39.13 [Amended] (a) Comments Due Date (c) Applicability ■ 2. The FAA amends § 39.13 by adding We must receive comments by June 22, (1) This AD applies to the following the following new airworthiness 2018. Learjet, Inc. model airplanes that are directive (AD): certificated in any category: (b) Affected ADs Learjet, Inc.: Docket No. FAA–2018–0327; Product Identifier 2018–CE–001–AD. None.

(d) Subject (ii) Paragraph 3.B.(1) of the applicable SB replacements parts following the Joint Aircraft System Component (JASC)/ for these models that have modified flap Accomplishment Instructions in Bombardier Air Transport Association (ATA) of America roller assemblies requires the operator to SB 55–27–41 Recommended, dated Code 2750, TE Flap Control System. contact Learjet Inc. for repair instructions, September 11, 2017. and after receiving the repair instructions (5) For Model 60 airplanes: Within the next (e) Unsafe Condition from Learjet, the operator will need to 12 months after the effective date of this AD This AD was prompted by reports of request an AMOC as specified in paragraph or within the next 200 landings after the fatigue cracks initiating in the flap support (j) of this AD in order to use the repair. effective date of this AD, whichever occurs structure due to repetitive flap loads. We are (2) For Models 31 and 31A airplanes: first, replace the nose roller fitting, nose issuing this AD to require replacement of the Within the next 24 months after the effective roller support bracket, and adjacent rib date of this AD or within the next 400 flap nose roller fitting, nose roller support support structure with replacement parts landings after the effective date of this AD, bracket, and adjacent rib support structure following the Accomplishment Instructions whichever occurs first, replace the nose roller in Bombardier Learjet 60 SB 60–27–39 with more robust components. The unsafe fitting, nose roller support bracket and Recommended, Revision 1, dated January 15, condition, if not addressed, could cause flap adjacent rib support structure with 2018. nose roller support bracket failure and allow replacements parts following the (6) For all airplanes: The compliance times skewed flap and aileron binding, which Accomplishment Instructions in Bombardier in this AD are presented in landings. If you could result in loss of roll control on Learjet 31 SB 31–27–35 Recommended, dated do not keep a record of the total number of approach with consequent loss of control. September 11, 2017. landings, then use a 1-to-1 conversion for (f) Compliance (3) For Models 35, 35A, 36, and 36A hours time-in-service (TIS) to landings. airplanes: Within the next 24 months after Example: 20 hours TIS = 20 landings. Comply with this AD within the the effective date of this AD or within the (7) For Models 31, 31A, 35, 35A, 36, 36A, compliance times specified, unless already next 400 landings after the effective date of 55, 55B, 55C, and 60 airplanes: Paragraph done. this AD, whichever occurs first, replace the 3.B.(2) of the applicable SBs for these models (g) Corrective Action nose roller fitting, nose roller support bracket that have modified flap roller assemblies and adjacent rib support structure with requires the operator to contact Learjet Inc. (1) For Models 28 and 29 airplanes: (i) replacements parts following the for repair instructions, and after receiving the Within the next 24 months after the effective Accomplishment Instructions in Bombardier repair instructions from Learjet, the operator date of this AD or within the next 400 Learjet 35/36 SB 35/36–27–50 will need to request an alternative method of landings after the effective date of this AD, Recommended, dated September 11, 2017. compliance (AMOC) as specified in whichever occurs first, replace the nose roller (4) For Models 55, 55B, and 55C airplanes: paragraph (j) of this AD in order to use the fitting, nose roller support bracket, and Within the next 24 months after the effective repair. adjacent rib support structure with date of this AD or within the next 400 replacements parts following the landings after the effective date of this AD, (h) Credit for Previous Actions Accomplishment Instructions in Bombardier whichever occurs first, replace the nose roller For Model 60 airplanes: This AD allows Learjet 28/29 Service Bulletin (SB) 28/29–27– fitting, nose roller support bracket, and credit for actions required in paragraph (g)(5) 31 Recommended, dated September 11, 2017. adjacent rib support structure with of this AD if done before the effective date

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of this AD following Bombardier Learjet 60 DEPARTMENT OF TRANSPORTATION information on the availability of this SB 60–27–39 Recommended, Basic Issue, material at the FAA, call 206–231–3195. dated September 11, 2017. Federal Aviation Administration Examining the AD Docket (i) No Reporting Requirement 14 CFR Part 39 You may examine the AD docket on Although Bombardier Learjet 28/29 SB 28/ the internet at http:// 29–27–31 Recommended, dated September [Docket No. FAA–2018–0396; Product www.regulations.gov by searching for 11, 2017; Bombardier Learjet 31 SB 31–27– Identifier 2017–NM–156–AD] and locating Docket No. FAA–2018– 35 Recommended, dated September 11, 2017; RIN 2120–AA64 0396; or in person at the Docket Bombardier Learjet 35/36 SB 35/36 -27–50 Management Facility between 9 a.m. Recommended, dated September 11, 2017; Airworthiness Directives; Airbus and 5 p.m., Monday through Friday, Bombardier Learjet 55 SB 55–27–41 Airplanes except Federal holidays. The AD docket Recommended, dated September 11, 2017; contains this NPRM, the regulatory and Bombardier Learjet 60 SB 60–27–39 AGENCY: Federal Aviation evaluation, any comments received, and Recommended, Revision 1, dated January 15, Administration (FAA), DOT. other information. The street address for 2018, all specify to submit a compliance ACTION: Notice of proposed rulemaking the Docket Operations office (telephone response form to the manufacturer per (NPRM). 800–647–5527) is in the ADDRESSES paragraph 3.E., this AD does not require that section. Comments will be available in action. SUMMARY: We propose to adopt a new the AD docket shortly after receipt. airworthiness directive (AD) for all (j) Alternative Methods of Compliance FOR FURTHER INFORMATION CONTACT: Dan Airbus Model A300 B4–600, B4–600R, (AMOCs) Rodina, Aerospace Engineer, and F4–600R series airplanes, and (1) The Manager, Wichita ACO branch, International Section, Transport Model A300 C4–605R Variant F FAA, has the authority to approve AMOCs Standards Branch, FAA, 2200 South airplanes (collectively called Model for this AD, if requested using the procedures 216th St., Des Moines, WA 98198; A300–600 series airplanes), and Model found in 14 CFR 39.19. In accordance with telephone and fax 206–231–3225. A310 series airplanes. This proposed 14 CFR 39.19, send your request to your SUPPLEMENTARY INFORMATION: principal inspector or local Flight Standards AD was prompted by a determination District Office, as appropriate. If sending that new or more restrictive Comments Invited maintenance requirements and information directly to the manager of the We invite you to send any written airworthiness limitations are necessary. certification office, send it to the attention of relevant data, views, or arguments about This proposed AD would require the person identified in paragraph (k)(1) of this proposal. Send your comments to revising the maintenance or inspection this AD. an address listed under the ADDRESSES program, as applicable, to incorporate (2) Before using any approved AMOC, section. Include ‘‘Docket No. FAA– new or more restrictive maintenance notify your appropriate principal inspector, 2018–0396; Product Identifier 2017– requirements and airworthiness or lacking a principal inspector, the manager NM–156–AD’’ at the beginning of your limitations. We are proposing this AD to of the local flight standards district office/ comments. We specifically invite address the unsafe condition on these certificate holding district office. comments on the overall regulatory, products. (k) Related Information economic, environmental, and energy DATES: We must receive comments on (1) For more information about this AD, aspects of this NPRM. We will consider this proposed AD by June 22, 2018. contact Tara Shawn, Aerospace Engineer, all comments received by the closing Wichita ACO Branch, 1801 Airport Road, ADDRESSES: You may send comments, date and may amend this NPRM based Room 100, Wichita, Kansas 67209; telephone: using the procedures found in 14 CFR on those comments. (316) 946–4141; fax: (316) 946–4107; email: 11.43 and 11.45, by any of the following We will post all comments we [email protected] or [email protected]. methods: receive, without change, to http:// • (2) For service information identified in Federal eRulemaking Portal: Go to www.regulations.gov, including any this AD, contact Learjet, Inc., One Learjet http://www.regulations.gov. Follow the personal information you provide. We Way, Wichita, Kansas 67209; telephone: 316– instructions for submitting comments. will also post a report summarizing each 946–2000; email: ac.ict@ • Fax: 202–493–2251. substantive verbal contact we receive aero.bombardier.com; internet: https:// • Mail: U.S. Department of about this NPRM. www.bombardier.com. You may review this Transportation, Docket Operations, M– Discussion referenced service information at the FAA, 30, West Building Ground Floor, Room Policy and Innovation Division, 901 Locust, W12–140, 1200 New Jersey Avenue SE, The European Aviation Safety Agency Kansas City, Missouri 64106. For information Washington, DC 20590. (EASA), which is the Technical Agent on the availability of this material at the • Hand Delivery: Deliver to Mail for the Member States of the European FAA, call (816) 329–4148. address above between 9 a.m. and 5 Union, has issued EASA Airworthiness p.m., Monday through Friday, except Directive 2017–0202, dated October 12, Issued in Kansas City, Missouri, on April 2017 (referred to after this as the 30, 2018. Federal holidays. For service information identified in Mandatory Continuing Airworthiness Melvin J. Johnson, this NPRM, contact Airbus SAS, Information, or ‘‘the MCAI’’), to correct Deputy Director, Policy & Innovation Division, Airworthiness Office—EAW, 1 Rond an unsafe condition for all Airbus Aircraft Certification Service. Point Maurice Bellonte, 31707 Blagnac Model A300 B4–600, B4–600R, and F4– [FR Doc. 2018–09600 Filed 5–7–18; 8:45 am] Cedex, France; telephone +33 5 61 93 36 600R series airplanes, and Model A300 BILLING CODE 4910–13–P 96; fax +33 5 61 93 44 51; email C4–605R Variant F airplanes [email protected]; (collectively called Model A300–600 internet http://www.airbus.com. You series airplanes), and Model A310 series may view this service information at the airplanes. The MCAI states: FAA, Transport Standards Branch, 2200 Maintenance requirements and South 216th St., Des Moines, WA. For airworthiness limitations for the Airbus

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