AD 74-14-02
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Textron Aviation Inc. | B19 | Airworthiness Directives; BEECH Models B19 and C23 Airplanes |
| aircraft | Textron Aviation Inc. | C23 | Airworthiness Directives; BEECH Models B19 and C23 Airplanes |
Unsafe Condition
Improper operation of the carburetor mixture and/or alternate air controls could result in loss of engine power or engine failure.
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Required Actions
Visually inspect the carburetor heat control and install Beech Kit No. 23-9013-1S (Models B19), inspect fuel mixture and/or carburetor heat controls and install Beech Kit 23-9013-3S and a spacer (Models C23 specified serial numbers), reroute fuel mixture control cable and install Beech Kit No. 23-9013-5S with spacer (other C23 serial numbers), and plug existing control hole with fireproof compound where cables are rerouted. Equivalent methods require FAA approval.
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Compliance Time
within 100 hours' time in service after the effective date of this AD, unless already accomplished
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Affected Aircraft
BEECH Models B19 Sport 150 (Serial Numbers MB-558 through MB-575) and Models C23 Sundowner 180 (Serial Numbers M-1413, M-1417, M-1421, M-1430 through M-1432, and additional serial ranges from M-1414 to M-1537, M-1523 through M-1537, M-1440 through M-1446, M-1448 through M-1451, M-1455, M-1459, M-1460, M-1462, M-1463, M-1465 through M-1491, M-1523 through M-1537)
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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