Airworthiness Directives; Sikorsky Aircraft-Manufactured Model S-64F Helicopters

Summary

The Federal Aviation Administration (FAA) has issued an airworthiness directive (AD) requiring inspections and potential replacement of the main gearbox second stage lower planetary plate on Sikorsky Aircraft-manufactured Model S-64F helicopters due to fatigue cracking incidents. The measure aims to prevent plate failure, which could lead to main gearbox failure and loss of helicopter control.