AD 63-27-02
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Grumman American Aviation Corporation | G-21 | Airworthiness Directives; Grumman Model G-21 Series Aircraft |
| aircraft | Grumman American Aviation Corporation | G-21A (Army OA-9, Navy JRF-1, -2, -3, -4, -5, and -6B) | Airworthiness Directives; Grumman Model G-21 Series Aircraft |
Unsafe Condition
Cracks found on the rod end fitting, P/N 12727-7, located at the aft end of the rudder control push rod assembly, P/N 12727-1.
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Required Actions
Remove the rudder control push rod assembly, clean both rod end fittings, inspect for cracks using dye penetrant and at least a 10-power magnifying glass, and replace any cracked parts with new P/N 12727-7 or FAA approved equivalent before further flight.
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Compliance Time
within 100 hours' time in service after the effective date of this AD, and thereafter at intervals not to exceed 100 hours' time in service from the last inspection
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Affected Aircraft
Grumman Model G-21 Series Aircraft (including G-21, G-21A, Army OA-9, Navy JRF-1, -2, -3, -4, -5, and -6B)
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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