Airworthiness Directive · Amendment 39-21823 · Electrical power
The Boeing Company Airplanes
This AD applies to all The Boeing Company Model MD-11 and MD-11F airplanes, certificated in any category.
The FAA is adopting a new airworthiness directive (AD) for all The Boeing Company Model MD-11 and MD-11F airplanes. This AD was prompted by reports indicating incidents of wires chafing against the inboard upper corner of the observer station circuit breaker panel. This AD requires, depending on airplane configuration, doing a general visual inspection of the right observer station upper main circuit breaker panel and wiring for certain missing parts; doing an inspection of the right observer station upper main circuit breaker panel to determine if a certain bracket part number is installed; doing a general visual inspection of certain wire assemblies for any damage; modifying the observer station upper main circuit breaker panel; and applicable on-condition actions. 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 MD11-24A204, Revision 2, dated April 14, 2021, do all applicable actions identified as “RC” (required for compliance) in, and in accordance with, the Accomplishment Instructions of Boeing Alert Service Bulletin MD11-24A204, Revision 2, dated April 14, 2021.
Where Boeing Alert Service Bulletin MD11-24A204, Revision 2, dated April 14, 2021, uses the phrase “the Revision 2 date of this service bulletin,” this AD requires using “the effective date of this AD.”
