AD 55-18-01
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Kelowna Flightcraft R & D Ltd. | 240 Series | CONVAIR Models 240 and 340 Aircraft |
| aircraft | Kelowna Flightcraft R & D Ltd. | 340 | CONVAIR Models 240 and 340 Aircraft |
Unsafe Condition
Inadvertent propeller reversing due to malfunctioning solenoid operated throttle locks and improper throttle operation at touchdown on landing.
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Required Actions
Install a protective device requiring a separate and distinct motion to engage reverse pitch, ensuring the lock reengages when throttles move toward idle from slow cruise or landing gear warning positions. Use Convair Bulletins 240-460A and 340-141A or FAA-approved alternate designs.
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Compliance Time
As soon as practicable but not later than January 1, 1957.
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Affected Aircraft
Convair Models 240 and 340 Aircraft, all serial numbers.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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