SCHWEIZER
SCHWEIZER 269A, A-1, B, C, C-1 and TH-55 helicopters [Docket No. FAA-2011-0593; Directorate Identifier 2011-SW-002-AD; Amendment 39-16723; AD 2011-12-16] – Remove each locknut on the tailboom support strut, verifying that each locknut has sufficient drag torque. Re-torque or replace the locknut, as...
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