AD 81-12-03
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Bell Helicopter Textron, Inc. | 214B | Airworthiness Directives; BELL HELICOPTER TEXTRON (BHT) Model 214 Series Helicopters |
| aircraft | Bell Helicopter Textron, Inc. | 214B-1 | Airworthiness Directives; BELL HELICOPTER TEXTRON (BHT) Model 214 Series Helicopters |
| aircraft | Bell Helicopter Textron, Inc. | 214ST | Airworthiness Directives; BELL HELICOPTER TEXTRON (BHT) Model 214 Series Helicopters |
Unsafe Condition
Failure of main rotor spindle attachment pin retention bolts, P/N EWB26-10H90, due to corrosion or exceeding 1,200 hours' time in service.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect each of the four main rotor spindle attachment pin retention bolts for corrosion; replace bolts exceeding 1,200 hours' time in service or showing corrosion. Install replacement bolts with corrosion prevention compound and proper torque.
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Compliance Time
within the next 50 hours' time in service after the effective date of this AD
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Affected Aircraft
Bell Helicopter Textron Model 214B, 214B-1, 214ST helicopters certified in all categories
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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