AD 67-33-03
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Kelowna Flightcraft R & D Ltd. | 240 Series | Airworthiness Directives; GENERAL DYNAMICS Model 240/340/440 Airplanes |
| aircraft | Kelowna Flightcraft R & D Ltd. | 340 | Airworthiness Directives; GENERAL DYNAMICS Model 240/340/440 Airplanes |
| aircraft | Kelowna Flightcraft R & D Ltd. | 440 | Airworthiness Directives; GENERAL DYNAMICS Model 240/340/440 Airplanes |
Unsafe Condition
Failure of the upper and lower diaphragm assemblies in the pressure fueling valves (P/N 2640644 or P/N 2650198) can cause overpressurization of the wing fuel tank.
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Required Actions
Externally inspect each wing for fuel leakage before further flight from the next maintenance base. If leakage is found, internally inspect for structural damage and repair as necessary. Install a placard near each underwing refuel valve within 30 days after October 3, 1972, unless already done. Follow placard instructions during fueling. Modify the underwing pressure fueling system with a pressure vent valve as specified to discontinue placard use.
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Compliance Time
Within thirty days after the effective date of this amendment to AD 67-33-03, unless already accomplished
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Affected Aircraft
GENERAL DYNAMICS Model 240/340/440 airplanes modified with underwing pressure fueling per STC Nos. SA1316WE, SA1132WE, SA1096WE, or SA1054WE.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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