AD 2014-12-01
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Textron | Various | Airworthiness Directives; Bell Helicopter Textron, Inc. (Bell) Helicopters |
| aircraft | Bell | Helicopter Textron | Airworthiness Directives; Bell Helicopter Textron, Inc. (Bell) Helicopters |
Unsafe Condition
A bearing with incorrect seal material, which could fail under extreme temperature or environmental conditions, resulting in loss of tail rotor control 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
Within 10 hours time in service (TIS), inspect each bearing to determine whether the seal material is correct. For each bearing with black seal material, inspect for leakage, slung grease, or damage; replace if any are found. Within 500 hours TIS or 6 months, whichever occurs earlier, replace any bearing with black seal material with an airworthy bearing with red/orange to brown color seal material. Do not install bearing P/N 214-040-606-005 or 214-040-606-101 with black seal material on any helicopter.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within 10 hours TIS for initial inspection; within 500 hours TIS or 6 months for replacement of defective bearings.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Bell Model 214B helicopters, S/N 28001 through 28070; Model 214B-1 helicopters, S/N 28001 through 28070; and Model 214ST helicopters, S/N 28101 through 28200, with tail rotor hanger bearing part number 214-040-606-005 or 214-040-606-101 installed.
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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