AD 68-07-01
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Kelowna Flightcraft R & D Ltd. | 340 | Airworthiness Directives; GENERAL DYNAMICS Models 340, 440 and C-131E Airplanes |
| aircraft | Kelowna Flightcraft R & D Ltd. | 440 | Airworthiness Directives; GENERAL DYNAMICS Models 340, 440 and C-131E Airplanes |
| aircraft | Kelowna Flightcraft R & D Ltd. | Military C-131E | Airworthiness Directives; GENERAL DYNAMICS Models 340, 440 and C-131E Airplanes |
Unsafe Condition
Cracks in the Pilot and Copilot Direct Vision Window Frame Casting (PNs 340-3110314-9, -10, -13, -14) affect structural integrity and have caused loss of cabin pressurization.
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Required Actions
Inspect Castings with 4500+ hours' time in service by the next 250 hours' time in service after effective date, then every 250 hours. Inspect Castings with <4500 hours' time in service before reaching 4750 hours, then every 250 hours. Use visual with 8x glass, dye penetrant, eddy current, or approved method. Replace cracked Castings if severed immediately (except non-pressurized flight to base) or within 250 hours if not severed, with interim zero cabin pressure and placard.
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Compliance Time
Effective April 29, 1968. Inspections required within specified intervals based on time in service.
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Affected Aircraft
GENERAL DYNAMICS Models 340, 440, and C-131E airplanes, including turbo propeller-powered variants.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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