Airworthiness Directive · Amendment 39-23477 · Fuselage
The Boeing Company Airplanes
(1) This AD applies to all The Boeing Company Model 757-300 series airplanes, certificated in any category.
(2) Installation of Supplemental Type Certificate (STC) ST01518SE does not affect the ability to accomplish the actions required by this AD. Therefore, for airplanes on which STC ST01518SE is installed, a “change in product” alternative method of compliance (AMOC) approval request is not necessary to comply with the requirements of 14 CFR 39.17.
The FAA is adopting a new airworthiness directive (AD) for all The Boeing Company Model 757-300 series airplanes. This AD was prompted by a crack growth analysis that indicated that existing maintenance planning data (MPD) and supplemental structural inspection program (SSIP) tasks do not provide adequate inspection opportunities to detect cracks in the upper frames around the uppermost fastener common to the fail-safe chord at the fuselage frame splices. This AD requires an inspection or maintenance record check for existing repairs, repetitive inspections of the upper frames around the uppermost fastener common to the fail-safe chord at the fuselage frame splices for any cracks, and applicable on-condition actions. The FAA is issuing this AD to address the unsafe condition on these products.
Except as specified by paragraph (h) of this AD: At the applicable times specified in the “Compliance” paragraph of Boeing Alert Requirements Bulletin 757-53A0122 RB, dated September 26, 2025, do all applicable actions identified in, and in accordance with, the Accomplishment Instructions of Boeing Alert Requirements Bulletin 757-53A0122 RB, dated September 26, 2025.
Note 1 to paragraph (g): Guidance for accomplishing the actions required by this AD can be found in Boeing Alert Service Bulletin 757-53A0122, dated September 26, 2025, which is referred to in Boeing Alert Requirements Bulletin 757-53A0122 RB, dated September 26, 2025.
(1) Where the Compliance Time column of the tables in the “Compliance” paragraph of Boeing Alert Requirements Bulletin 757-53A0122 RB, dated September 26, 2025, refers to the original issue date of Requirements Bulletin 757-53A0122 RB, this AD requires using the effective date of this AD.
(2) Where Boeing Alert Requirements Bulletin 757-53A0122 RB, dated September 26, 2025, specifies contacting Boeing for repair instructions or for alternative inspections: This AD requires doing the repair, or doing the alternative inspections and applicable on-condition actions, using a method approved in accordance with the procedures specified in paragraph (i) of this AD.
(3) Where Table 2 in the “Compliance” paragraph and the Accomplishment Instructions of Boeing Alert Requirements Bulletin 757-53A0122 RB, dated September 26, 2025, states “S-13L and S-14L”, for this AD replace that text with “S-13R and S-14R”.
