AD 73-07-01
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Kelowna Flightcraft R & D Ltd. | 340 | Airworthiness Directives; GENERAL DYNAMICS Model 340, 440 and C-131E Airplanes |
| aircraft | Kelowna Flightcraft R & D Ltd. | 440 | Airworthiness Directives; GENERAL DYNAMICS Model 340, 440 and C-131E Airplanes |
| aircraft | Kelowna Flightcraft R & D Ltd. | Military C-131E | Airworthiness Directives; GENERAL DYNAMICS Model 340, 440 and C-131E Airplanes |
Unsafe Condition
Cracks in the wing front spar lower caps adjacent to main landing gear drag strut attachment fittings.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Visually inspect wing front spar lower caps daily from exterior until next inspection; within 100 hours' time in service after AD effective date (or within last 500 hours), inspect from wing interior by removing access cover, and repeat every 600 hours. Repair cracks before further flight if found.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
As soon as practicable but not to exceed 10 hours' time in service after AD effective date for initial exterior inspections. Subsequent interior inspections within 100 hours' time in service after AD effective date (or within last 500 hours), then every 600 hours' time in service.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
GENERAL DYNAMICS Model 340, 440, C-131E, and STC SA1096WE/SA4-1100 converted Model 640/580 airplanes.
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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