AD 56-21-02
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Cessna Aircraft Company | T-50 | Airworthiness Directives; CESSNA Model T-50 Airplanes |
Unsafe Condition
Spar deterioration in the rear spar just outboard of the fuselage fittings in the area of the inside corner of the fuel tank compartment.
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Required Actions
Inspect the rear spar for wood deterioration annually by removing a 6 inches x 4 inches plywood section or fuel tank. Repair deterioration by removing damaged wood, fitting a tapered inlay, and installing a reinforcing strip. Replace deteriorated gussets, stringers, and felt padding with neoprene coated material if needed.
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Compliance Time
on or before the next periodic inspection but not later than January 1, 1957, and at each periodic inspection thereafter
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Affected Aircraft
All Cessna Model T-50 (AT-17 Series and UC-78 Series) Aircraft.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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