AD 70-08-01
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Schweizer Aircraft Corporation | 269A | Airworthiness Directives; Hughes Model 269A, 269A-1, 269A-2, and 269B Series Helicopters |
| aircraft | Schweizer Aircraft Corporation | 269A-1 | Airworthiness Directives; Hughes Model 269A, 269A-1, 269A-2, and 269B Series Helicopters |
| aircraft | Schweizer Aircraft Corporation | 269B | Airworthiness Directives; Hughes Model 269A, 269A-1, 269A-2, and 269B Series Helicopters |
Unsafe Condition
Flapping hinge bolts, part number HS 1446-10-68 with vendor identification AC, may develop cracks or experience head separation due to fatigue, leading to failure of the flapping hinge assembly.
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Required Actions
Inspect AC bolts via dye penetrant or magnaflux within 25 hours' time in service. Replace cracked bolts and mark them. Reinspect within 225 hours' time in service. Replace all AC bolts with non-AC identified bolts within 400 hours' time in service or six months. Perform preflight visual checks for head separation before each flight.
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Compliance Time
Within 25 hours' time in service after the effective date of this AD for initial inspection, within 225 hours' time in service after the effective date for reinspection, and within 400 hours' time in service or six months, whichever occurs first, for final replacement.
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Affected Aircraft
Schweizer Aircraft Corporation Model 269A, 269A-1, 269A-2, and 269B helicopters with flapping hinge bolts P/N HS 1446-10-68 marked AC on the bolt heads.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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