AD 2013-20-13
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Textron | Various | Airworthiness Directives; Bell Helicopter Textron Canada Limited (Bell) Helicopters |
| aircraft | Bell | 206B and 206L | Airworthiness Directives; Bell Helicopter Textron Canada Limited (Bell) 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
Revise the Operating Limitations section of the Rotorcraft Flight Manual (RFM) by inserting specific sections from Bell manuals. Remove existing placard part number 230-075-213-121 or 230-075-213-123, if installed. Install new placard part number 230-075-213-125 or equivalent on the instrument panel below the dual tachometer.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within 30 days
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Affected Aircraft
Bell Model 206B helicopters, serial number 004 through 4675, including those converted from Model 206A, and Bell Model 206L helicopters, serial number 45001 through 45153, and 46601 through 46617.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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