Summary
We propose to adopt a new airworthiness directive (AD) for all Turbomeca S.A. ASTAZOU XIV B and XIV H engines. This proposed AD was prompted by reports of cracks on the 2nd-stage turbine disc. This proposed AD would require replacement of the 2nd-stage turbine disc. We are proposing this AD to prevent disc cracking, uncontained 2nd-stage turbine blade release, damage to the engine, and damage to the helicopter.