AD 67-06-01
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Bell Helicopter Textron, Inc. | 204B | Airworthiness Directives; Bell Model 204-B Helicopters |
Unsafe Condition
Tail rotor blades may not be properly balanced and tracked, leading to improper balance and track which could result in tail rotor instability or failure.
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Required Actions
Track the hub and blade assembly within 100 hours' time in service after the effective date, unless already done within the last 25 hours. Balance the assembly within 100 hours' time in service after the effective date, unless already done within the last 200 hours. Thereafter, track every 100 hours' time in service and balance every 300 hours' time in service. Adjust intervals may be approved upon request with substantiating data.
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Compliance Time
Within the next 100 hours' time in service after the effective date of this AD
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Affected Aircraft
Bell Model 204-B Helicopters equipped with Tail Rotor Hub and Blade Assembly, P/N 204-011-701-9 or 204-011-701-15.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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