Airworthiness Directive · Amendment 39-22547 · Wings
The Boeing Company Airplanes
This AD applies to The Boeing Company Model 747-100, 747-100B, 747-100B SUD, 747-200B, 747-200C, 747-200F, 747-300, 747-400, 747-400D, 747-400F, and 747SR series airplanes, certificated in any category, as identified in Boeing Alert Requirements Bulletin 747-57A2367 RB, Revision 1, dated March 20, 2023.
The FAA is superseding Airworthiness Directive (AD) 2021-02- 15, which applied to certain The Boeing Company Model 747-100, 747- 100B, 747-100B SUD, 747-200B, 747-200C, 747-200F, 747-300, 747-400, 747-400D, 747-400F, and 747SR series airplanes. AD 2021-02-15 required repetitive replacement of certain parts; an inspection to determine production configuration for certain parts; repetitive lubrication of certain parts and a repetitive inspection of certain parts for any exuding grease; repetitive inspections of certain parts for loose or missing attachment bolts, cracks or bushing migration, cracks or gouges, or broken, binding, or missing rollers; repetitive inspections of certain parts for cracks or corrosion; repetitive lubrication; and on-condition actions if necessary. This AD was prompted by the FAA's determination that certain compliance times must be reduced in order to address the unsafe condition. This AD continues to require the actions specified in AD 2021-02-15 with certain reduced compliance times. The FAA is issuing this AD to address the unsafe condition on these products.
This paragraph restates the requirements of paragraph (g) of AD 2021-02-15, with revised compliance times and service information. Except as specified by paragraph (h) of this AD: At the applicable times specified in the “Compliance” paragraph of Boeing Alert Requirements Bulletin 747-57A2367 RB, Revision 1, dated March 20, 2023, do all applicable actions identified in, and in accordance with, the Accomplishment Instructions of Boeing Alert Requirements Bulletin 747-57A2367 RB, Revision 1, dated March 20, 2023.
Note 1 to paragraph (g): Guidance for accomplishing the actions required by this AD can be found in Boeing Alert Service Bulletin 747-57A2367, Revision 1, dated March 20, 2023, which is referred to in Boeing Alert Requirements Bulletin 747-57A2367 RB, Revision 1, dated March 20, 2023.
(1) Where the Compliance Time columns of the tables in the “Compliance” paragraph of Boeing Alert Requirements Bulletin 747-57A2367 RB, Revision 1, dated March 20, 2023, use the phrase “the original issue date of Requirements Bulletin 747-57A2367 RB,” this AD requires using March 30, 2021 (the effective date of AD 2021-02-15).
(2) Where the Compliance Time columns of the tables in the “Compliance” paragraph of Boeing Alert Requirements Bulletin 747-57A2367 RB, Revision 1, dated March 20, 2023, use the phrase “the Revision 1 date of Requirements Bulletin 747-57A2367 RB,” this AD requires using “the effective date of this AD.”
