AD 79-10-10
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Thrush Aircraft, Inc. | 600 S-2D | Airworthiness Directives; Ayres Corporation Model S-2D and S-2R Airplanes |
| aircraft | Thrush Aircraft, Inc. | S-2R | Airworthiness Directives; Ayres Corporation Model S-2D and S-2R Airplanes |
Unsafe Condition
Separation of the single upper hinge from the rudder assembly and consequent possible loss of airplane directional control.
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Required Actions
Perform a visual repetitive inspection within 10 hours' time in service after the effective date, and at intervals not to exceed 100 hours' time in service. If cracks are found, replace or modify the rudder assembly with triple upper hinges (P/N 54030-987), install Ayres Custom Kit No. CK-AG-18, replace with an airworthy single upper hinge assembly, or repair per AC 43.13-1A. If no cracks, continue inspections every 100 hours' time in service.
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Compliance Time
Within 10 hours' time in service after the effective date of this AD, and at intervals not to exceed 100 hours' time in service
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Affected Aircraft
Ayres Corporation Model S-2D and S-2R airplanes with rudder assembly having single upper hinge (P/N 54030-87)
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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