Summary
The FAA proposes to adopt a new airworthiness directive (AD) for International Aero Engines AG (IAE) V2500-A1, V2527E-A5, V2530-A5, and V2528-D5 turbofan engines. This proposed AD would require reducing the published life limit of certain high-pressure compressor (HPC) stage 9-12 disc assemblies. This proposed AD would also remove from service those HPC stage 9-12 disc assemblies using a drawdown schedule. This proposed AD results from IAE updating the low-cycle-fatigue (LCF) life analysis for certain HPC stage 9-12 disc assemblies. We are proposing this AD to prevent an uncontained failure of the HPC stage 9- 12 disc assembly, resulting in an in-flight engine shutdown and possible damage to the airplane.