Airworthiness Directive · Amendment 39-17414 · International Aero Engines AG Turbofan Engines
International Aero Engines AG Turbofan Engines
This AD applies to International Aero Engines AG (IAE), V2525-D5 and V2528-D5 turbofan engines, serial numbers V20001 through V20285, with No. 4 bearing internal scavenge tube, part number (P/N) 2A2074-01, and No. 4 bearing external scavenge tube, P/N 6A5254, installed.
We are adopting a new airworthiness directive (AD) for certain International Aero Engines AG (IAE), V2525-D5 and V2528-D5 turbofan engines, with a certain No. 4 bearing internal scavenge tube and a certain No. 4 bearing external scavenge tube installed. This AD was prompted by a report of an engine under-cowl fire and commanded in- flight shutdown. This AD would require replacement of certain part number (P/N) No. 4 bearing internal scavenge tubes, and alignment checks of certain P/N No. 4 bearing external scavenge tubes. We are issuing this AD to prevent engine fire and damage to the airplane.
Replace the No. 4 bearing internal scavenge tube, P/N 2A2074-01, at each combustor module-level exposure after the No. 4 bearing internal scavenge tube has accumulated 10,000 flight cycles (FCs) since new. If the FCs on the tube cannot be confirmed, replace the tube at each combustor module-level exposure.
At each installation, check the alignment of the No. 4 bearing external scavenge tube, P/N 6A5254, in accordance with paragraph 3.A. PART 2, of IAE Non-Modification Service Bulletin (NMSB) No. V2500-ENG-72-0630, Revision 1, dated September 20, 2012. If the tube is misaligned, replace with a new tube.
Combustor module-level exposure is defined as separation of the combustor case and the compressor case flanges.
