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Wed, Aug 22, 2007

AD: Sikorsky

AD NUMBER: 2007-17-05
MANUFACTURER: Sikorsky
SUBJECT: Airworthiness Directive 2007-17-05
SUMMARY:
This amendment adopts a new airworthiness directive (AD) for Sikorsky Aircraft Corporation (Sikorsky) Model S92-A helicopters.

This action requires, within a specified time, borescope inspecting a certain part-numbered tail rotor pitch change shaft and bearing assembly (shaft and bearing assembly) and also inspecting after any installation.

This amendment is prompted by an incident involving failure of a shaft and bearing assembly and servo clevis shaft resulting in loss of tail rotor control.

The actions specified in this AD are intended to prevent failure of a shaft and bearing assembly, loss of tail rotor pitch and yaw control, and subsequent loss of control of a helicopter.

FMI: www.faa.gov/regulations_policies/airworthiness_directives/

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