AD 2013-11-05
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
Incorrectly manufactured seal material on the tail rotor hanger bearing, which does not meet Bell specifications, could result in seal failure and grease loss, potentially leading to bearing failure and loss of control of the helicopter.
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Required Actions
Inspect each bearing within 10 hours time-in-service (TIS) to determine if the seal material is correct. If incorrect, inspect the bearing at intervals not exceeding 10 hours TIS for leakage, slung grease, or damage. Replace the bearing with an airworthy one that does not have a black seal if there is leakage, slung grease, or damage, before further flight.
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Compliance Time
Within 10 hours TIS
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Affected Aircraft
Bell Model 214B, 214B-1, and 214ST helicopters with part number 214-040-606-005 and 214-040-606-101 bearings installed between May 2011 and June 2012. Serial numbers affected: Model 214B and 214B-1, S/N 28001 through 28070; Model 214ST, S/N 28101 through 28200.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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