Airworthiness Directive · Amendment 39-22938 · Landing gear
The Boeing Company Airplanes
This AD applies to all 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, 747SP, and 747SR series airplanes, certificated in any category.
The FAA is adopting a new airworthiness directive (AD) for all The Boeing Company (Boeing) Model 747-100, 747-100B, 747-100B SUD, 747- 200B, 747-200C, 747-200F, 747-300, 747-400, 747-400D, 747-400F, 747SP, and 747SR series airplanes. This AD was prompted by a report of improper inner diameter grinding of landing gear outer cylinders, resulting in possible heat damage to the outer cylinder of the nose landing gear (NLG), body landing gear (BLG), and wing landing gear (WLG). This AD requires replacing any affected outer cylinders. The FAA is issuing this AD to address the unsafe condition on these products.
Except as specified in paragraph (h) of this AD: At the applicable times specified in the “Compliance” paragraph of Boeing Alert Requirements Bulletin 747-32A2535 RB, dated January 22, 2024, do all applicable actions identified in, and in accordance with, the Accomplishment Instructions of Boeing Alert Requirements Bulletin 747-32A2535 RB, dated January 22, 2024.
Note 1 to paragraph (g): Guidance for accomplishing the actions required by this AD can be found in Boeing Alert Service Bulletin 747-32A2535, dated January 22, 2024, which is referred to in Boeing Alert Requirements Bulletin 747-32A2535 RB, dated January 22, 2024.
(1) Where the “Boeing Recommended Compliance Time” column in the table under the “Compliance” paragraph of Boeing Alert Requirements Bulletin 747-32A2535 RB, dated January 22, 2024, refers to “the Original Issue date of Requirements Bulletin 747-32A2535 RB,” this AD requires using the effective date of this AD.
(2) Where Appendix B of Boeing Alert Requirements Bulletin 747-32A2535 RB, dated January 22, 2024, specifies two-digit serial numbers, add two leading zeros (e.g., serial number 47 should be 0047).
(3) Where Appendix B of Boeing Alert Requirements Bulletin 747-32A2535 RB, dated January 22, 2024, specifies three-digit serial numbers, add one leading zero (e.g., serial number 109 should be 0109).
