Airworthiness Directive · Amendment 39-22809 · Wings
The Boeing Company Airplanes
This AD applies to The Boeing Company Model 747-400F series airplanes, certificated in any category, as identified in Boeing Alert Requirements Bulletin 747-57A2371 RB, dated September 29, 2023.
The FAA is adopting a new airworthiness directive (AD) for certain The Boeing Company Model 747-400F series airplanes. This AD was prompted by a report that cap seals were not applied to certain fasteners in the fuel tanks during production. This AD requires applying cap seals to certain fastener collars inside the fuel tanks. 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 747-57A2371 RB, dated September 29, 2023, do all applicable actions identified in, and in accordance with, the Accomplishment Instructions of Boeing Alert Requirements Bulletin 747-57A2371 RB, dated September 29, 2023.
Note 1 to paragraph (g): Guidance for accomplishing the actions required by this AD can be found in Boeing Alert Service Bulletin 747-57A2371, dated September 29, 2023, which is referred to in Boeing Alert Requirements Bulletin 747-57A2371 RB, dated September 29, 2023.
(1) Where Compliance Time columns of the tables in the “Compliance” paragraph of Boeing Alert Requirements Bulletin 747-57A2371 RB, dated September 29, 2023, use the phrase “the original issue date of Requirements Bulletin 747-57A2371 RB,” this AD requires using the effective date of this AD.
(2) Where Boeing Alert Requirements Bulletin 747-57A2371 RB, dated September 29, 2023, states “BMS 5-45, CLASS B-2, GRADE 1,” this AD requires replacing that text with “BMS 5-45, CLASS B-2.”
