AD 58-01-03
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Kelowna Flightcraft R & D Ltd. | 340 | CONVAIR Model 440 and 340 Aircraft |
| aircraft | Kelowna Flightcraft R & D Ltd. | 440 | CONVAIR Model 440 and 340 Aircraft |
Unsafe Condition
The PR-58E5-17 carburetor setting has an undesirable leaning tendency, resulting in potential power loss in the high power range when metering on the rich side of allowable limits.
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Required Actions
Modify the PR-58E5-17 carburetor setting to the PR-58E5-29 setting per Bendix Service Bulletin No. 820, revise Airplane Flight Manuals with Convair Service Bulletins 340-144A and 440-58, and mark the Auto-Lean mixture control position clearly.
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Compliance Time
by first engine overhaul after March 1, 1958, but not later than October 1, 1958
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Affected Aircraft
CONVAIR Model 440 serial numbers 312 through 420 and all Model 340 with Model 440 nacelles, equipped with PR-58E5-17 carburetors in P&W Double Wasp CB16 and 17 engines.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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