2021-22-23: Wings

1. The authority citation for part 39 continues to read as follows: Authority: 49 U.S.C. 106(g), 40113, 44701. 2. The FAA amends § 39.13 by adding the following new airworthiness directive: 2021-22-23 The Boeing Company: Amendment 39-21796; Docket No. FAA-2021-0262; Project Identifier AD-2020-00815-T. (a) Effective Date This airworthiness directive (AD) is effective December 29, 2021. (b) Affected ADs None. (c) Applicability This AD applies to all The Boeing Company Model 757-200, -200PF, -200CB, and -300 series airplanes, certificated in any category. (d) Subject Air Transport Association (ATA) of America Code 57, Wings. (e) Unsafe Condition This AD was prompted by crack indications found in the lower aft wing skin bolt holes where the flap tracks attach to the track support fitting; this finding was on a Model 737-300 series airplane, which has a similar design to the Model 757 airplanes. The FAA is issuing this AD to address undetected cracking in the lower aft wing skin, which could result in the inability of the structure to carry limit load and could adversely affect the structural integrity of the airplane. (f) Compliance Comply with this AD within the compliance times specified, unless already done. (g) Required Actions (1) For all airplanes except those identified in paragraph (g)(2) of this AD: Except as specified by paragraph (h) of this AD, at the applicable times specified in the "Compliance" paragraph of Boeing Alert Requirements Bulletin 757-57A0074 RB, dated June 11, 2020, do all applicable actions identified in, and in accordance with, the Accomplishment Instructions of Boeing Alert Requirements Bulletin 757-57A0074 RB, dated June 11, 2020. Note 1 to paragraph (g)(1): Guidance for accomplishing the actions required by this AD can be found in Boeing Alert Service Bulletin 757-57A0074, dated June 11, 2020, which is referred to in Boeing Alert Requirements Bulletin 757-57A0074 RB, dated June 11, 2020. (2) For airplanes on which Aviation Partners Boeing blended winglets or scimitar blended winglets are installed using supplemental type certificate (STC) ST01518SE, or on which they have been installed and subsequently removed: Except as specified by paragraph (h) of this AD, at the applicable times specified in paragraph 1.E., "Compliance" of Aviation Partners Boeing Alert Service Bulletin AP757-57-011, dated August 21, 2020, do all applicable actions identified as "RC" (required for compliance) in, and in accordance with, the Accomplishment Instructions of Aviation Partners Boeing Alert Service Bulletin AP757-57-011, dated August 21, 2020. (h) Exceptions to Service Information Specifications (1) Where Boeing Alert Requirements Bulletin 757-57A0074 RB, dated June 11, 2020, uses the phrase "the original issue date of Requirements Bulletin 757-57A0074 RB," this AD requires using "the effective date of this AD." (2) Where Boeing Alert Requirements Bulletin 757-57A0074 RB, dated June 11, 2020, specifies contacting Boeing for repair instructions: This AD requires doing the repair before further flight using a method approved in accordance with the procedures specified in paragraph (i) of this AD. (3) Where Aviation Partners Boeing Alert Service Bulletin AP757-57-011, dated August 21, 2020, uses the phrase "the original issue date of this service bulletin," this AD requires using "the effective date of this AD." (4) Where Aviation Partners Boeing Alert Service Bulletin AP757-57-011, dated August 21, 2020, specifies contacting Boeing for repair instructions: This AD requires doing the repair before further flight using a method approved in accordance with the procedures specified in paragraph (i) of this AD. (i) Alternative Methods of Compliance (AMOCs) (1) The Manager, Los Angeles ACO Branch, FAA, has the authority to approve AMOCs for this AD, if requested using the procedures found in 14 CFR 39.19. In accordance with 14 CFR 39.19, send your request to your principal inspector or responsible Flight Standards Office, as appropriate. If sending information directly to the manager of the certification office, send it to the attention of the person identified in Related Information. Information may be emailed to: [email protected]. (2) Before using any approved AMOC, notify your appropriate principal inspector, or lacking a principal inspector, the manager of the responsible Flight Standards Office. (3) An AMOC that provides an acceptable level of safety may be used for any repair, modification, or alteration required by this AD if it is approved by The Boeing Company Organization Designation Authorization (ODA) that has been authorized by the Manager, Los Angeles ACO Branch, FAA, to make those findings. To be approved, the repair method, modification deviation, or alteration deviation must meet the certification basis of the airplane, and the approval must specifically refer to this AD. (j) Related Information For more information about this AD, contact David Truong, Aerospace Engineer, Airframe Section, FAA, Los Angeles ACO Branch, 3960 Paramount Boulevard, Lakewood, CA 90712-4137; phone: 562-627-5224; email: [email protected]. (k) Material Incorporated by Reference (1) The Director of the Federal Register approved the incorporation by reference (IBR) of the service information listed in this paragraph under 5 U.S.C. 552(a) and 1 CFR part 51. (2) You must use this service information as applicable to do the actions required by this AD, unless the AD specifies otherwise. (i) Aviation Partners Boeing Alert Service Bulletin AP757-57-011, dated August 21, 2020. (ii) Boeing Alert Requirements Bulletin 757-57A0074 RB, dated June 11, 2020. (3) For Boeing service information identified in this AD, contact Boeing Commercial Airplanes, Attention: Contractual & Data Services (C&DS), 2600 Westminster Blvd., MC 110-SK57, Seal Beach, CA 90740-5600; telephone 562-797-1717; internet https://www.myboeingfleet.com. For Aviation Partners Boeing service information identified in this AD, contact Aviation Partners Boeing, 2811 S. 102nd Street, Suite 200, Seattle, WA 98168; telephone: 206-830-7699; internet: https://www.aviationpartnersboeing.com. (4) You may view this service information at the FAA, Airworthiness Products Section, Operational Safety Branch, 2200 South 216th St., Des Moines, WA. For information on the availability of this material at the FAA, call 206-231-3195. (5) You may view this service information that is incorporated by reference at the National Archives and Records Administration (NARA). For information on the availability of this material at NARA, [email protected] , or go to: https://www.archives.gov/federal-register/cfr/ibr-locations.html. Issued on October 22, 2021. Lance T. Gant, Director, Compliance & Airworthiness Division, Aircraft Certification Service. [FR Doc. 2021-25533 Filed 11-23-21; 8:45 am]BILLING CODE 4910-13-P