AD 52-14-02
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Kelowna Flightcraft R & D Ltd. | 240 Series | CONVAIR Model 240 Airplanes |
| aircraft | Kelowna Flightcraft R & D Ltd. | 340 | CONVAIR Model 240 Airplanes |
Unsafe Condition
Inadvertent actuation of the reversing solenoid valves due to lack of protection between reversing solenoid circuits and other circuits, and insufficient shielding between circuits, which could lead to unintended propeller reversal and loss of engine control.
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Required Actions
Install insulating separators between throttle microswitches, modify electrical circuits to shield reversing solenoid circuits from others, comply with specified service bulletins, and implement maintenance practices including inspections and checks at specified intervals.
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Compliance Time
Progressive modification program to begin no later than August 1, 1952, and completed no later than August 1, 1953.
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Affected Aircraft
CONVAIR Model 240 airplanes with Hamilton Standard propellers, except as otherwise indicated; also includes Model 340 airplanes with Hamilton Standard propellers for Item IV.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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