AD 85-18-06
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Bell Helicopter Textron, Inc. | 214B | Airworthiness Directives; BELL HELICOPTER TEXTRON, INC Model 214B/B1 and 214ST Series Helicopters |
| aircraft | Bell Helicopter Textron, Inc. | 214B-1 | Airworthiness Directives; BELL HELICOPTER TEXTRON, INC Model 214B/B1 and 214ST Series Helicopters |
| aircraft | Bell Helicopter Textron, Inc. | 214ST | Airworthiness Directives; BELL HELICOPTER TEXTRON, INC Model 214B/B1 and 214ST Series Helicopters |
Unsafe Condition
Failure of the main rotor drag brace assembly due to cracks or corrosion that cannot be removed within rework criteria.
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Required Actions
Inspect main rotor drag brace assembly (Part Numbers 214-010-113-001 or 003) per BHTI Alert Service Bulletin 214-85-28 or 214ST-85-29. Replace with serviceable parts if cracks are found or corrosion exceeds rework limits.
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Compliance Time
within the next 10 hours' time in service, unless previously accomplished, and thereafter at 250 hour intervals
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Affected Aircraft
Bell Helicopter Textron, Inc. Model 214B/B1 and 214ST series helicopters certificated 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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