SCHWEIZER Model 269A, A-1, B, and C and TH-55A
SCHWEIZER Model 269A, A-1, B, and C and TH-55A helicopters (Docket No. 96-SW-05-AD) - proposes, for helicopters with a certain rotor transmission ring gear installed, inspections of the ring gear teeth for pitting, wearing, cracking or corrosion, and replacement of the ring gear if deterioration is...
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