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Fri, Nov 13, 2015

AD: Sikorsky Aircraft Corporation (TC Previously Held by Schweizer Aircraft)

AD NUMBER: 2015-23-01

PRODUCT: Sikorsky Aircraft Corporation (Sikorsky) Model 269A, 269A-1, 269B, 269C, 269C-1, 269D, and TH-55A helicopters.

ACTION: Final Rule

SUMMARY:  This AD requires repetitively inspecting and lubricating the tail rotor (T/R) driveshaft splined fittings.

This AD was prompted by a report that the T/R driveshaft can disconnect due to deterioration of the splined coupling.

The actions are intended to detect and prevent excessive wear of the splined coupling, which could lead to failure of the T/R driveshaft and subsequent loss of control of the helicopter.

DATES: This AD is effective December 15, 2015.

FMI: AD

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