AD 2021-11-01
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Textron | Canada Limited | Airworthiness Directives; Bell Textron Canada Limited Helicopters |
| aircraft | Bell | Textron Canada Limited | Airworthiness Directives; Bell Textron Canada Limited Helicopters |
Unsafe Condition
third stage turbine vibration, which could result in turbine failure, engine power loss, and subsequent loss of control of the helicopter
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
revising the Operating Limitations and the Normal Procedures sections of the existing RFM for your helicopter and installing or replacing a placard
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
within 25 hours time-in-service (TIS)
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Affected Aircraft
Bell Textron Canada Limited (Bell) helicopters, Model 206B, serial number (S/N) 004 through 4690 inclusive, including helicopters converted from Model 206A; and Bell Model 206L, S/N 45001 through 45153 inclusive, and 46601 through 46617 inclusive
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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