AD 64-18-04
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Kelowna Flightcraft R & D Ltd. | 240 Series | Airworthiness Directives; GENERAL DYNAMICS Models 240, 340 and 440 Series Aircraft |
| aircraft | Kelowna Flightcraft R & D Ltd. | 340 | Airworthiness Directives; GENERAL DYNAMICS Models 240, 340 and 440 Series Aircraft |
| aircraft | Kelowna Flightcraft R & D Ltd. | 440 | Airworthiness Directives; GENERAL DYNAMICS Models 240, 340 and 440 Series Aircraft |
Unsafe Condition
Cracks in the 0.190 (+0, -.030) inch radius at the upper end of the nose landing gear retract fork shank diameter and insufficient radius less than 0.160 inch may lead to failure of the fork assembly.
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Required Actions
Inspect for cracks using dye penetrant, magnetic particle, or FAA-approved equivalent inspection, and dimensionally inspect the radius. Rework radius to 0.190 (+0, -.030) inch if below 0.160 inch, ensuring adjacent diameter is not undercut. Refinish per Convair Service Airgram No. 179 or FAA-approved method. Replace fork assembly if cracks are found before further flight. Repetitive inspections may be discontinued after rework, shot peening, and refinish as specified.
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Compliance Time
Within 800 hours' time in service after the effective date of this AD, unless already accomplished within the last 200 hours' time in service, and thereafter at periods not to exceed 1,000 hours' time in service from the last inspection.
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Affected Aircraft
GENERAL DYNAMICS Models 240, 340 and 440 Series Aircraft incorporating Nose Landing Gear Retract Fork, Menasco P/N 523526 R/L.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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