AD 59-01-01
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Kelowna Flightcraft R & D Ltd. | 240 Series | CONVAIR Model 240, 340 and 440 Aircraft |
| aircraft | Kelowna Flightcraft R & D Ltd. | 340 | CONVAIR Model 240, 340 and 440 Aircraft |
| aircraft | Kelowna Flightcraft R & D Ltd. | 440 | CONVAIR Model 240, 340 and 440 Aircraft |
Unsafe Condition
The fire detector system's original design, rendered inoperative by Convair Service Air Gram No. 173 due to false warnings, failed to adequately detect fires originating in zones one and two of the engine nacelle, as demonstrated by inflight fire experience and fire tests.
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Required Actions
Modify the continuous type fire detector system on 440 aircraft with improved detector elements, assemblies, connectors, control box cannon plugs, and mounting provisions. For 240 and 340 aircraft, either install an equivalent continuous type system with AFM revisions or install three unit-type detectors at each bellmouth and airflow modifications per specified service bulletins.
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Compliance Time
440 aircraft not later than December 31, 1958; 340 and 240 aircraft not later than April 30, 1960.
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Affected Aircraft
CONVAIR Model 240 and 340 aircraft, and Model 440 serial numbers 312 through 502.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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