AD 80-18-04 R1
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Bell Helicopter Textron Canada Limited | 206A | Airworthiness Directives; BELL Models 206A, 206B, 206A-1, 206B-1, 206L, and 206L-1 Helicopters |
| aircraft | Bell Helicopter Textron Canada Limited | 206A-1 (OH-58A) | Airworthiness Directives; BELL Models 206A, 206B, 206A-1, 206B-1, 206L, and 206L-1 Helicopters |
| aircraft | Bell Helicopter Textron Canada Limited | 206B | Airworthiness Directives; BELL Models 206A, 206B, 206A-1, 206B-1, 206L, and 206L-1 Helicopters |
| aircraft | Bell Helicopter Textron Canada Limited | 206B-1 | Airworthiness Directives; BELL Models 206A, 206B, 206A-1, 206B-1, 206L, and 206L-1 Helicopters |
| aircraft | Bell Helicopter Textron Canada Limited | 206L | Airworthiness Directives; BELL Models 206A, 206B, 206A-1, 206B-1, 206L, and 206L-1 Helicopters |
| aircraft | Bell Helicopter Textron Canada Limited | 206L-1 | Airworthiness Directives; BELL Models 206A, 206B, 206A-1, 206B-1, 206L, and 206L-1 Helicopters |
Unsafe Condition
Failure of the main rotor trunnion due to fatigue cracks in parts numbered 206-010-104-3, 206-011-113-001, or 206-011-120-001.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Accomplish magnetic particle inspections per Bell Helicopter Textron Alert Service Bulletins 206-80-7/206L-80-9 or FAA-approved equivalent. Inspections must be done within specified intervals based on trunnion time in service: trunnions with <1,100 hours must inspect before 1,200 and 2,400 hours, then every 600 hours. Trunnions with 1,100-1,700 hours or unknown time must inspect within next 100 hours, then every 600 hours. Replace trunnion if cracks found before further flight. Report cracks to FAA as specified.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Compliance required as indicated in the AD, with specific inspection timelines based on trunnion time in service as of the effective date (November 24, 1980).
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Bell Helicopter Textron Canada Limited Models 206A, 206B, 206A-1, 206B-1, 206L, 206L-1 helicopters equipped with main rotor trunnions P/N 206-010-104-3, 206-011-113-001, or 206-011-120-001.
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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