Airworthiness Directive · Amendment 39-22893 · Engine exhaust
The Boeing Company Airplanes
This AD applies to The Boeing Company Model MD-11 and MD-11F airplanes, certificated in any category, equipped with General Electric (GE) CF6-80C2D1F high-bypass turbofan engines.
The FAA is adopting a new airworthiness directive (AD) for certain The Boeing Company Model MD-11 and MD-11F airplanes. This AD was prompted by a report of a Model MD-11F airplane experiencing an uncommanded deployment of a thrust reverser in flight at low altitude. This AD requires initial and repetitive detailed inspections and repetitive wire integrity tests of the engine pylon thrust reverser control system wire harnesses, junction box assembly and junction box cover, left-side and right-side thrust reverser electrical harnesses, core (engine compartment) miscellaneous wire harness assembly, and 30- degree bulkhead wire harness assembly; and applicable on-condition actions. This AD also requires reporting inspection results. 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 paragraph 1.E., “Compliance,” of Boeing Alert Service Bulletin MD11-78A017, Revision 1, dated June 4, 2024, do all applicable actions identified as “RC” (required for compliance) in, and in accordance with, the Accomplishment Instructions of Boeing Alert Service Bulletin MD11-78A017, Revision 1, dated June 4, 2024.
(1) Where the Compliance Time columns of the tables in the “Compliance” paragraph of Boeing Alert Service Bulletin MD11-78A017, Revision 1, dated June 4, 2024, use the phrase “the original issue date of this service bulletin,” this AD requires using the effective date of this AD.
(2) Where Step 1, Part 10 of Boeing Alert Service Bulletin MD11-78A017, Revision 1, dated June 4, 2024, specifies doing a detailed inspection of the junction box assembly for any loose electrical connection and Step 2, Part 11 of Boeing Alert Service Bulletin MD11-78A017, Revision 1, dated June 4, 2024, specifies applying applicable torque to any loose electrical connection, those actions are not required for compliance with this AD.
At the applicable time specified in paragraph (i)(1) or (2) of this AD, submit a report to The Boeing Company via the Boeing Communication System (BCS) and include the information specified in Appendixes C, D, and E of Boeing Alert Service Bulletin MD11-78A017, Revision 1, dated June 4, 2024.
(1) If the inspection or test was done on or after the effective date of this AD: Submit the report within 90 days after the inspection or test.
(2) If the inspection or test was done before the effective date of this AD: Submit the report within 90 days after the effective date of this AD.
