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on the internet at http://www.regulations.gov the modified horizontal stabilizer 2018–0271; Product Identifier 2017– by searching for and locating Docket No. leading edge. We are proposing this AD NM–111–AD’’ at the beginning of your FAA–2018–0277. to address the unsafe condition on these comments. We specifically invite (2) For more information about this AD, products. comments on the overall regulatory, contact Dan Rodina, Aerospace Engineer, economic, environmental, and energy International Section, Transport Standards DATES: We must receive comments on Branch, FAA, 2200 South 216th St., Des this proposed AD by June 1, 2018. aspects of this proposed AD. We will Moines, WA 98198; telephone and fax 206– ADDRESSES: You may send comments, consider all comments received by the 231–3225. using the procedures found in 14 CFR closing date and may amend this (3) For service information identified in 11.43 and 11.45, by any of the following proposed AD based on those comments. We will post all comments we this AD, contact Airbus SAS, Airworthiness methods: Office—EAW, 1 Rond Point Maurice receive, without change, to http:// • Federal eRulemaking Portal: Go to Bellonte, 31707 Blagnac Cedex, France; www.regulations.gov, including any http://www.regulations.gov. Follow the telephone +33 5 61 93 36 96; fax +33 5 61 personal information you provide. We 93 44 51; email account.airworth-eas@ instructions for submitting comments. • Fax: 202–493–2251. will also post a report summarizing each airbus.com; internet http://www.airbus.com. substantive verbal contact we receive You may view this service information at the • Mail: U.S. Department of about this proposed AD. FAA, Transport Standards Branch, 2200 Transportation, Docket Operations, M– South 216th St., Des Moines, WA. For 30, West Building Ground Floor, Room Discussion information on the availability of this W12–140, 1200 New Jersey Avenue SE, We issued AD 2016–13–06, material at the FAA, call 206–231–3195. Washington, DC 20590. • Amendment 39–18570 (81 FR 41432, Issued in Des Moines, Washington, on Hand Delivery: Deliver to Mail June 27, 2016) (‘‘AD 2016–13–06’’), for March 30, 2018. address above between 9 a.m. and 5 certain Saab AB, Saab Aeronautics Chris Spangenberg, p.m., Monday through Friday, except Model 340A (SAAB/SF340A) and SAAB Acting Director, System Oversight Division, Federal holidays. 340B airplanes. AD 2016–13–06 was Aircraft Certification Service. For service information identified in prompted by reports of ruptured [FR Doc. 2018–07626 Filed 4–16–18; 8:45 am] this NPRM, contact Saab AB, Saab horizontal stabilizer de-icing boots. AD BILLING CODE 4910–13–P Aeronautics, SE–581 88, Linko¨ping, 2016–13–06 requires a revision of the Sweden; telephone: +46 13 18 5591; fax: applicable AFM, repetitive inspections +46 13 18 4874; email: of the horizontal stabilizer de-icing DEPARTMENT OF TRANSPORTATION [email protected]; boots, and applicable corrective actions. internet: http://www.saabgroup.com. We issued AD 2016–13–06 to detect and Federal Aviation Administration You may view this referenced service correct damage of the de-icing boot; information at the FAA, Transport such damage could lead to a ruptured 14 CFR Part 39 Standards Branch, 2200 South 216th St., boot, severe vibrations, and possible [Docket No. FAA–2018–0271; Product Des Moines, WA. For information on the reduced control of the airplane. Identifier 2017–NM–111–AD] availability of this material at the FAA, Since we issued AD 2016–13–06, the call 206–231–3195. manufacturer has developed an RIN 2120–AA64 Examining the AD Docket improved de-icing boot, reinforced through double stitch lines. Airworthiness Directives; Saab AB, You may examine the AD docket on Saab Aeronautics (Formerly Known as The European Aviation Safety Agency the internet at http:// (EASA), which is the Technical Agent Saab AB, Saab Aerosystems) www.regulations.gov by searching for Airplanes for the Member States of the European and locating Docket No. FAA–2018– Union, has issued EASA AD 2017–0144, AGENCY: Federal Aviation 0271; or in person at the Docket dated August 9, 2017 (referred to after Administration (FAA), DOT. Management Facility between 9 a.m. this as the Mandatory Continuing and 5 p.m., Monday through Friday, ACTION: Notice of proposed rulemaking Airworthiness Information, or ‘‘the except Federal holidays. The AD docket (NPRM). MCAI’’), to correct an unsafe condition contains this proposed AD, the for certain Saab AB, Saab Aeronautics SUMMARY: We propose to supersede regulatory evaluation, any comments Model 340A (SAAB/SF340A) and SAAB Airworthiness Directive (AD) 2016–13– received, and other information. The 340B airplanes. The MCAI states: 06, which applies to certain Saab AB, street address for the Docket Operations office (telephone: 800–647–5527) is in Several occurrences were reported of Saab Aeronautics Model 340A (SAAB/ rupture of the horizontal stabilizer de-icing SF340A) and SAAB 340B airplanes. AD the ADDRESSES section. Comments will boot in flight. In some of the reported events, 2016–13–06 requires a revision of the be available in the AD docket shortly the de-icing boot had formed a large open applicable airplane flight manual after receipt. scoop. (AFM), repetitive inspections of the FOR FURTHER INFORMATION CONTACT: This condition, if not detected and horizontal stabilizer de-icing boots, and Shahram Daneshmandi, Aerospace corrected, could lead to complete loss of the applicable corrective actions. Since we Engineer, International Section, de-icing function within its associated zone and severe vibrations, possibly resulting in issued AD 2016–13–06, the Transport Standards Branch, FAA, 2200 reduced control of the aeroplane. manufacturer has developed an South 216th St., Des Moines, WA 98198; To address this potential unsafe condition, improved de-icing boot. This proposed telephone and fax: 206–231–3220. Saab AB, Aeronautics (hereafter referred to as AD would continue to require a revision SUPPLEMENTARY INFORMATION: ‘‘Saab’’ in this [EASA] AD) issued Alert of the applicable AFM, repetitive Operations Bulletin (AOB) No. 12 and AOB inspections of the horizontal stabilizer Comments Invited No. 23 as temporary measures, de-icing boots, and applicable corrective We invite you to send any written recommending to select Flaps 0 for landing in the event of a suspected rupture of the de- actions. This proposed AD would also relevant data, views, or arguments about icing boot on the horizontal stabilizer. In require replacement of single stitched this proposal. Send your comments to addition, Saab issued SB [Service Bulletin] de-icing boots with improved double an address listed under the ADDRESSES 340–30–094 providing instructions for stitched boots, and re-identification of section. Include ‘‘Docket No. FAA– inspection of de-icing boots.

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Consequently, EASA issued AD 2015–0129 Design Authority, we have been notified of ADs is normally a function of the [which corresponds to FAA AD 2016–13–06] of the unsafe condition described in the Compliance and Airworthiness to require amendment of the applicable MCAI and service information Division, but during this transition Aircraft Flight Manual (AFM), repetitive referenced above. We are proposing this period, the Executive Director has inspections of the horizontal stabilizer de- icing boots and, depending on findings, AD because we evaluated all pertinent delegated the authority to issue ADs accomplishment of applicable corrective information and determined an unsafe applicable to transport category action(s). condition exists and is likely to exist or airplanes to the Director of the System Since that [EASA] AD was issued, Saab develop on other products of these same Oversight Division. developed an improved de-icing boot, type designs. reinforced through double stitch lines, and Regulatory Findings Costs of Compliance issued SB 340–30–095 providing instructions We determined that this proposed AD for boot replacement. We estimate that this proposed AD would not have federalism implications For the reason described above, this affects 51 airplanes of U.S. registry. under Executive Order 13132. This [EASA] AD retains the requirements of EASA The actions required by AD 2016–13– AD 2015–0129, which is superseded, and proposed AD would not have a 06, and retained in this proposed AD substantial direct effect on the States, on requires replacement of single stitched de- take about 6 work-hours per product, at icing boots, installed on the left-hand (LH) the relationship between the national and right-hand (RH) horizontal stabilizer, an average labor rate of $85 per work- Government and the States, or on the with improved double stitched boots, and re- hour. Based on these figures, the distribution of power and identification of the modified horizontal estimated cost of the actions that are responsibilities among the various stabilizer leading edge. required by AD 2016–13–06 is $510 per levels of government. You may examine the MCAI in the product. In addition, we estimate that any For the reasons discussed above, I AD docket on the internet at http:// necessary follow-on actions required by certify this proposed regulation: www.regulations.gov by searching for AD 2016–13–06, and retained in this 1. Is not a ‘‘significant regulatory and locating Docket No. FAA–2018– proposed AD take about 6 work-hours action’’ under Executive Order 12866; 0271. and require parts costing $9,500, for a 2. Is not a ‘‘significant rule’’ under the Related Service Information Under cost of $10,010 per product. We have no DOT Regulatory Policies and Procedures 1 CFR Part 51 way of determining the number of (44 FR 11034, February 26, 1979); Saab AB, Saab Aeronautics has issued aircraft that might need these actions. 3. Will not affect intrastate aviation in We also estimate that it would take the following service information. Alaska; and • about 6 work-hours per product to Service Bulletin 340–30–094, dated 4. Will not have a significant March 27, 2015. This service comply with the basic requirements of this proposed AD. The average labor economic impact, positive or negative, information describes procedures for on a substantial number of small entities repetitive detailed inspections of the de- rate is $85 per work-hour. Required parts would cost about $13,500 per under the criteria of the Regulatory icing boots installed on the horizontal Flexibility Act. stabilizers, and repair and replacement product. Based on these figures, we of damaged de-icing boots. estimate the cost of this proposed AD on List of Subjects in 14 CFR Part 39 • Service Bulletin 340–30–095, dated U.S. operators to be $714,510, or April 3, 2017. This service information $14,010 per product. Air transportation, Aircraft, Aviation safety, Incorporation by reference, describes procedures for replacement of Authority for This Rulemaking single stitched de-icing boots with Safety. Title 49 of the United States Code improved double stitched boots, and re- The Proposed Amendment identification of the modified horizontal specifies the FAA’s authority to issue stabilizer leading edge. rules on aviation safety. Subtitle I, Accordingly, under the authority Saab AB, Saab Aeronautics has also section 106, describes the authority of delegated to me by the Administrator, issued the following AFMs, which the FAA Administrator. ‘‘Subtitle VII: the FAA proposes to amend 14 CFR part describe performance limitations and Aviation Programs,’’ describes in more 39 as follows: general data. These AFMs are distinct detail the scope of the Agency’s since they apply to different airplane authority. PART 39—AIRWORTHINESS models in different configurations. We are issuing this rulemaking under DIRECTIVES • AFM 340A 001, Revision 57, dated the authority described in ‘‘Subtitle VII, March 27, 2015. Part A, Subpart III, Section 44701: ■ 1. The authority citation for part 39 • AFM 340B 001, Revision 35, dated General requirements.’’ Under that continues to read as follows: March 27, 2015. section, Congress charges the FAA with Authority: 49 U.S.C. 106(g), 40113, 44701. • AFM 340B 010, Revision 28, dated promoting safe flight of civil aircraft in March 27, 2015. air commerce by prescribing regulations § 39.13 [Amended] This service information is reasonably for practices, methods, and procedures ■ 2. The FAA amends § 39.13 by available because the interested parties the Administrator finds necessary for removing Airworthiness Directive (AD) have access to it through their normal safety in air commerce. This regulation 2016–13–06, Amendment 39–18570 (81 course of business or by the means is within the scope of that authority FR 41432, June 27, 2016), and adding identified in the ADDRESSES section. because it addresses an unsafe condition the following new AD: that is likely to exist or develop on FAA’s Determination and Requirements products identified in this rulemaking Saab AB, Saab Aeronautics (Formerly of This Proposed AD action. Known as Saab AB, Saab Aerosystems): This product has been approved by This AD is issued in accordance with Docket No. FAA–2018–0271; Product Identifier 2017–NM–111–AD. the aviation authority of another authority delegated by the Executive country, and is approved for operation Director, Aircraft Certification Service, (a) Comments Due Date in the United States. Pursuant to our as authorized by FAA Order 8000.51C. We must receive comments by June 1, bilateral agreement with the State of In accordance with that order, issuance 2018.

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(b) Affected ADs icing boots, in accordance with the information. This MCAI may be found in the This AD replaces AD 2016–13–06, Accomplishment Instructions of Saab Service AD docket on the internet at http:// Amendment 39–18570 (81 FR 41432, June Bulletin 340–30–094, dated March 27, 2015. www.regulations.gov by searching for and 27, 2016) (‘‘AD 2016–13–06’’). Repeat the inspection thereafter at intervals locating Docket No. FAA–2018–0271. not to exceed 400 flight hours. If, during any (2) For more information about this AD, (c) Applicability inspection required by this paragraph, any contact Shahram Daneshmandi, Aerospace This AD applies to Saab AB, Saab damage or existing repair outside the limits Engineer, International Section, Transport Aeronautics (formerly known as Saab AB, specified in Saab Service Bulletin 340–30– Standards Branch, FAA, 2200 South 216th Saab Aerosystems) airplanes, certificated in 094, dated March 27, 2015, is found, before St., Des Moines, WA 98198; telephone and any category, identified in paragraphs (c)(1) further flight, repair or replace the horizontal fax: 206–231–3220. and (c)(2), of this AD. stabilizer de-icing boots, in accordance with (3) For service information identified in (1) Saab AB, Saab Aeronautics Model 340A the Accomplishment Instructions of Saab this AD, contact Saab AB, Saab Aeronautics, (SAAB/SF340A) airplanes, serial numbers Service Bulletin 340–30–094, dated March SE–581 88, Linko¨ping, Sweden; telephone: 004 through 138 inclusive, if Saab 27, 2015. Repair or replacement on an +46 13 18 5591; fax: +46 13 18 4874; email: modification 1462 has been embodied in airplane of the horizontal stabilizer de-icing [email protected]; production, or Saab Service Bulletin 340–55– boots, as required by this paragraph, does not internet: http://www.saabgroup.com. You 008 has been embodied in service, except constitute terminating action for the may view this service information at the those that have also embodied Saab repetitive inspections required by this FAA, Transport Standards Branch, 2200 modification 1793 in production, or Saab paragraph for that airplane. South 216th St., Des Moines, WA. For Service Bulletin 340–55–010 in service; and (i) New Requirement of This AD: information on the availability of this serial numbers 139 through 159 inclusive. Modification material at the FAA, call 206–231–3195. (2) Saab AB, Saab Aeronautics Model Issued in Des Moines, Washington, on SAAB 340B airplanes, serial numbers 160 Within 18 months after the effective date March 30, 2018. through 459 inclusive. of this AD, modify the airplane by replacing the single stitched de-icing boots installed on Chris Spangenberg, (d) Subject the left-hand (LH) and right-hand (RH) Acting Director, System Oversight Division, Air Transport Association (ATA) of horizontal stabilizers with double stitched Aircraft Certification Service. America Code 30, Ice and rain protection. de-icing boots and re-identify the LH and RH horizontal stabilizer leading edge, in [FR Doc. 2018–07636 Filed 4–16–18; 8:45 am] (e) Reason accordance with the Accomplishment BILLING CODE 4910–13–P This AD was prompted by reports of Instructions of Saab Service Bulletin 340–30– ruptured horizontal stabilizer de-icing boots. 095, dated April 3, 2017. We are issuing this AD to detect and correct DEPARTMENT OF TRANSPORTATION (j) Terminating Action ruptured horizontal stabilizer de-icing boots, which could lead to complete loss of the de- Modification of the airplane as required by Federal Aviation Administration icing function within its associated zone and paragraph (i) of this AD, constitutes severe vibrations, possibly resulting in terminating action for the repetitive 14 CFR Part 39 reduced control of the airplane. inspections required by paragraph (h) of this AD, for that airplane. [Docket No. FAA–2018–0142; Product (f) Compliance Identifier 2018–NE–04–AD] (k) Other FAA AD Provisions Comply with this AD within the RIN 2120–AA64 compliance times specified, unless already (1) Alternative Methods of Compliance done. (AMOCs): The Manager, International Section, Transport Standards Branch, FAA, Airworthiness Directives; General (g) Retained Revision of the Airplane Flight has the authority to approve AMOCs for this Electric Company CF34–8E Engines Manual (AFM), With No Changes AD, if requested using the procedures found AGENCY: This paragraph restates the requirements of in 14 CFR 39.19. In accordance with 14 CFR Federal Aviation paragraph (g) of AD 2016–13–06, with no 39.19, send your request to your principal Administration (FAA), DOT. changes. Within 30 days after August 1, 2016 inspector or local Flight Standards District ACTION: Notice of proposed rulemaking (the effective date of AD 2016–13–06), revise Office, as appropriate. If sending information (NPRM). the ‘‘Abnormal Procedures’’ section of the directly to the International Section, send it applicable Saab 340 AFM to incorporate the to the attention of the person identified in SUMMARY: We propose to adopt a new revision specified in paragraphs (g)(1) paragraph (l)(2) of this AD. Information may airworthiness directive (AD) for all through (g)(3) of this AD. be emailed to: 9-ANM-116-AMOC- General Electric Company (GE) CF34–8E (1) For Saab AB, Saab Aeronautics Model [email protected]. Before using any turbofan engines. This proposed AD was 340A (SAAB/SF340A) airplanes, revise AFM approved AMOC, notify your appropriate prompted by a report from GE regarding 340A 001 by incorporating Revision 57, principal inspector, or lacking a principal dated March 27, 2015. inspector, the manager of the local flight a quality escape of nonconforming (2) For Saab AB, Saab Aeronautics Model standards district office/certificate holding thrust reverser fire seals. This proposed SAAB 340B airplanes, revise AFM 340B 001 district office. AD would require a one-time inspection by incorporating Revision 35, dated March (2) Contacting the Manufacturer: As of the of the gap between the core cowl seal 27, 2015. effective date of this AD, for any requirement and the pylon seal of the thrust reverser (3) For Saab AB, Saab Aeronautics Model in this AD to obtain corrective actions from for correct gap width, and replacement SAAB 340B airplanes with extended wing a manufacturer, the action must be of the seals, if needed. We are proposing tips, revise AFM 340B 010 by incorporating accomplished using a method approved by this AD to address the unsafe condition Revision 28, dated March 27, 2015. the Manager, International Section, Transport Standards Branch, FAA; or the European on these products. (h) Retained Inspection/Replacement, With Aviation Safety Agency (EASA); or Saab AB, DATES: We must receive comments on No Changes Saab Aeronautics EASA Design Organization this proposed AD by June 1, 2018. This paragraph restates the requirements of Approval (DOA). If approved by the DOA, ADDRESSES: You may send comments, paragraph (h) of AD 2016–13–06, with no the approval must include the DOA- using the procedures found in 14 CFR changes. Within 400 flight hours or 6 authorized signature. months, whichever occurs first after August 11.43 and 11.45, by any of the following 1, 2016 (the effective date of AD 2016–13– (l) Related Information methods: 06), do a detailed inspection for damage of (1) Refer to Mandatory Continuing • Federal eRulemaking Portal: Go to the horizontal stabilizer de-icing boots, and Airworthiness Information (MCAI) EASA AD http://www.regulations.gov. Follow the existing repairs of horizontal stabilizer de- 2017–0144, dated August 9, 2017, for related instructions for submitting comments.

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