Airworthiness Directive · Amendment 39-12622 · General Electric Company GE90 Series Turbofan Engines
General Electric Company GE90 Series Turbofan Engines
The Federal Register printed this AD without its applicability text. Read it at the link below.
This amendment supersedes an existing airworthiness directive (AD), that is applicable to General Electric Company (GE) GE90-76B, - 77B, -85B, -90B, and -92B model turbofan engines. That AD currently requires initial and repetitive eddy current inspections (ECI) for cracks in the high pressure compressor (HPC) stage 2-6 spool, and, if necessary, replacement with serviceable parts. That amendment was prompted by reports of cracks in the stage 3-4 and stage 4-5 interstage seal teeth and spacer arms. This amendment deletes reference to the GE90-92B engine model, deletes reference to HPC spool part number (P/N) 350-005-769-0 and directs the removal from service of affected part number spools by either engine cycles or calendar date, whichever occurs first. This amendment is prompted by the introduction of a new design HPC stage 2-6 spool and four additional HPC stage 2-6 spool P/N's that are terminating action for the repetitive inspection requirements for certain P/N spools. The actions specified by this AD are intended to prevent failure of the HPC stage 2-6 spool due to cracks, which could result in an uncontained engine failure and damage to the airplane.
