AD 94-19401
Published 1994-08-10 · 5 models · 31 US-registered tails affected · Federal Register
Airworthiness Directives; Bell Helicopter Textron, Inc. Model 214B, 214B-1, and 214ST Helicopters Federal Register ↗
Abstract
This amendment adopts a new airworthiness directive (AD), applicable to Bell Helicopter Textron, Inc. Model 214B, 214B-1, and 214ST helicopters, that establishes a mandatory retirement life of 60,000 high-power events for the main rotor trunnion (trunnion), which is currently not a life-limited part. This amendment is prompted by the manufacturer's analysis and retesting that has shown that frequent takeoffs and external load lifts (high-power events) shorten the life of the trunnion. The actions specified by this AD are intended to prevent fatigue failure of the trunnion, loss of the main rotor, and subsequent loss of control of the helicopter.
Applicability · by US fleet size
- BELL 214ST TCDS H10SW 18 tails
- BELL 214B-1 TCDS H6SW 9 tails
- BELL 214B TCDS H6SW 2 tails
- BELL HELICOPTER TEXTRON 214ST TCDS H10SW 1 tails
- BELL 214 1 tails
Compliance instructions
Required actions, compliance times, parts/serial numbers and methods of compliance are in the Federal Register publication — not paraphrased here. Read AD on Federal Register ↗