AD Amdt-39-11055
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Textron | Various | Airworthiness Directives; Bell Helicopter Textron, Inc. Model 214B and 214B-1 Helicopters |
| aircraft | Bell | Helicopter Textron | Airworthiness Directives; Bell Helicopter Textron, Inc. Model 214B and 214B-1 Helicopters |
Unsafe Condition
Fatigue failure of the pillow block bearing bolts due to an unanticipated high number of torque events and time-in-service, which could lead to main rotor system failure and loss of control.
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Required Actions
Create a component history card or equivalent record using the Retirement Index Number (RIN) system. Establish a system for tracking increases to the accumulated RIN. Remove bearing bolts from service when the accumulated RIN reaches 17,000.
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Compliance Time
Before further flight
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Affected Aircraft
Bell Helicopter Textron, Inc. Model 214B and 214B-1 helicopters.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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