AD 2015-12-02
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Textron | Various | Airworthiness Directives; Bell Helicopter Textron Canada Limited |
| aircraft | Bell | Various | Airworthiness Directives; Bell Helicopter Textron Canada Limited |
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
Install placard P/N 230-075-213-117, or equivalent, on the instrument panel directly below the dual tachometer. Revise the Operating Limitations section of the Rotorcraft Flight Manual (RFM) by inserting a copy of this AD into the RFM or by making pen and ink changes as specified.
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Compliance Time
Within 30 days
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Affected Aircraft
Bell Model 206L-1 with Engine Upgrade Kit part number (P/N) 206-706-520-101 installed; Bell Model 206L-3, serial number (S/N) 51001 through 51612, except those with a Rolls-Royce 250-C20R engine installed under Supplemental Type Certificate (STC) No. SR00036SE; Bell Model 206L-4, S/N 52001 through 52313, except those with a Rolls-Royce 250-C20R engine installed under STC No. SR00036SE.
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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