Pratt & Whitney Canada Proposes New Airworthiness Directive for PW305 and PW305A Turbofan Engines

Summary

Pratt & Whitney Canada has proposed a new airworthiness directive to remove stage 4 low pressure turbine disks from service before reaching lower cyclic life limits, following a spin pit test analysis that indicates the disks may not have full published life, in order to prevent engine failure and airplane damage.