AD 99-18-02
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Bell Helicopter Textron, Inc. | 205A-1 | Airworthiness Directives; Bell Helicopter Textron, Inc. Model 205A-1 and 205B Helicopters |
| aircraft | Bell Helicopter Textron, Inc. | 205B | Airworthiness Directives; Bell Helicopter Textron, Inc. Model 205A-1 and 205B Helicopters |
Unsafe Condition
Fatigue cracking or corrosion on the vertical fin spar cap could lead to failure of the vertical fin spar, loss of the tail rotor, and subsequent loss of control of the helicopter.
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Required Actions
Inspect the vertical fin spar cap for cracks, corrosion, or disbonding using visual and tap hammer inspections; modify the vertical fin per specified service bulletin; replace the left-hand spar cap with an approved configuration; perform dye-penetrant inspections after modifications; and repeat inspections at specified intervals. Replace components if cracks are found before further flight.
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Compliance Time
Within 8 hours time-in-service for initial inspections and modifications; within 25 hours TIS for further modifications; within 12 calendar months to replace the left-hand spar cap; and subsequent inspections at intervals not exceeding 8 or 300 hours TIS.
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Affected Aircraft
Bell Helicopter Textron, Inc. Model 205A-1 and 205B helicopters with vertical fin spar cap part numbers 212-030-447-001, -101 installed.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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