AD 74-08-12
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Bell Helicopter Textron Canada Limited | 206A | Airworthiness Directives; Bell Model 206A and 206B Helicopters |
| aircraft | Bell Helicopter Textron Canada Limited | 206A-1 (OH-58A) | Airworthiness Directives; Bell Model 206A and 206B Helicopters |
| aircraft | Bell Helicopter Textron Canada Limited | 206B | Airworthiness Directives; Bell Model 206A and 206B Helicopters |
| aircraft | Bell Helicopter Textron Canada Limited | 206B-1 | Airworthiness Directives; Bell Model 206A and 206B Helicopters |
Unsafe Condition
Loose rivets in the tail boom skin splice from Station 300 to Station 341 on the left-hand side of the boom and cracked tail boom skin in the same area.
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Required Actions
Inspect visually the rivets for looseness or working in the skin splice and inspect the tail boom skin for cracks using a three power or higher magnifying glass. Replace loose rivets with AN470AD5-2 or CR2249-5-2 or equivalent rivets before further flight. Replace cracked tail booms before further flight with a serviceable tail boom in accordance with Section VIII of the Model 206A/B Maintenance and Overhaul Instructions or repair cracked tail booms in accordance with FAA or FAA DER approved repair data.
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Compliance Time
within 50 hours time in service after the effective date of this A.D., unless already accomplished within the last 50 hours time in service, and thereafter at intervals not to exceed 100 hours time in service from the last inspection
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Affected Aircraft
Bell Helicopter Textron Canada Limited Model 206A, 206A-1 (OH-58A), 206B, 206B-1 helicopters, serial numbers 1 through 944
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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