AD 68-16-04
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Kelowna Flightcraft R & D Ltd. | 240 Series | Airworthiness Directives; GENERAL DYNAMICS Model 240 Airplanes |
| aircraft | Kelowna Flightcraft R & D Ltd. | 340 | Airworthiness Directives; GENERAL DYNAMICS Model 240 Airplanes |
| aircraft | Kelowna Flightcraft R & D Ltd. | 440 | Airworthiness Directives; GENERAL DYNAMICS Model 240 Airplanes |
Unsafe Condition
Potential flammable fluid ignition sources in the main landing gear wheel well due to gaps in engine exhaust duct flange joint thermal insulation collars and exhaust leakage through flange joints.
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Required Actions
Inspect mating surfaces of engine exhaust duct flange joint thermal insulation collars for gaps and replace if necessary. Inspect exhaust duct flange joints for leakage and replace gaskets with specified part numbers. Modify insulation collars per service bulletin, modify electrical insulation in generator control units, and relocate control units as specified.
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Compliance Time
Within the next 50 hours' time in service after December 27, 1968 for initial inspections, with recurring inspections not to exceed 185 hours' time in service. Modifications must be completed within the next 4,000 hours' time in service after December 27, 1968.
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Affected Aircraft
General Dynamics Model 240, 340, and 440 airplanes equipped with Rolls Royce MK 542-4 engines and specific Dowty Rotol propellers under Supplemental Type Certificates SA1054WE and SA1096WE.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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