Superseded. This AD was superseded by AD 2023-07-09. Verify which one applies to your serial and effectivity before any maintenance action.
AD 2022-27-07
Effective 01/13/2023 · Published 12/29/2022
Airworthiness Directives; The Boeing Company Airplanes
Summary
The FAA is adopting a new airworthiness directive (AD) for certain The Boeing Company Model 747-400 and 747-8 series airplanes. This AD was prompted by reports of wear-through of the motor impeller inlet adapter of a transfer pump for the horizontal stabilizer fuel tank caused by contact between the pump inlet check valve and the inlet adapter. This AD requires inspecting for wear of the motor impeller inlet check v…