Airworthiness Directives; McDonnell Douglas Helicopter Systems Model 369F and 369FF Helicopters
airworthiness · Rule · Final rule. · Published 1998-04-02 · Effective 1998-05-07 · 63 FR 16109
Document
Document number
98-8584
Federal Register citation
63 FR 16109
Type
Rule
Action
Final rule.
Category
airworthiness
Manufacturer
McDonnell Douglas Helicopter Systems Model 369F and 369FF
Publication date
1998-04-02
Effective date
1998-05-07
FAA docket
Docket No. 97-SW-03-AD
Abstract
This amendment adopts a new airworthiness directive (AD), applicable to McDonnell Douglas Helicopter Systems (MDHS) Model 369F and 369FF helicopters, that requires removing the tail rotor control rod assembly (rod assembly) and replacing it with an airworthy rod assembly. This amendment is prompted by a failure of a rod assembly during a proof-load test conducted by the manufacturer. The actions specified by this AD are intended to prevent buckling of the rod assembly when subjected to ultimate jam loads, loss of tail rotor control, and subsequent loss of control of the helicopter.