# AD 75-17-37: Carburetor Mixture and/or Heat Control

- Type: Airworthiness directive
- Status: Current
- Products: Textron 19A, 23, A23, A23-19, A23-24, A23A, A24, A24R, B19, B23, B24R, C23 and 1 more
- Effective: August 20, 1975
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Small airplane
- Amendment: 39-2339
- Registered aircraft: 1,349 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/CB1BE6CD64596AF486256A08006E697A.0001
- DRS record last changed: January 21, 2026
- Page: https://openairdocs.org/ad/75-17-37

## The airworthiness directive

75-17-37 BEECH: Amendment 39-2339. Applies to A23-19, 19A, M19A and B19 (Serial Numbers MB-1 thru MB-520), B19 Sport 150 (Serial Numbers MB-521 thru MB-776); 23, A23, A23A, B23 and C23 (Serial Numbers M-1 thru M-1361): C23 Sundowner 180 (Serial Numbers M-1362 thru M-1664); A23-24 and A24 (Serial Numbers MA-1 thru MA-368); A24R (Serial Numbers MC-2 thru MC-95); A24R and B24R Sierra 200 (Serial Numbers MC-96 thru MC-360) airplanes.

Compliance: Required as indicated, unless already accomplished.

To assure proper operation of the carburetor mixture and/or carburetor heat control cables, within the next 50 hours' time in service after the effective date of this AD, accomplish the following:

Visually inspect the mixture and/or carburetor heat control cables to assure freedom of motion and adjust where necessary in accordance with Beechcraft Service Instructions No. 0717- 159 or subsequent revisions or by any equivalent method approved by the Chief, Engineering and Manufacturing Branch, FAA, Central Region. Aircraft equipped with fuel injection engines do not have carburetor heat control cables.

This amendment becomes effective August 20, 1975.

## Affected data sheets (1) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS A1CE](https://openairdocs.org/tcds/A1CE): Textron Aviation Inc.; names 13 of 14 models: A23-24, M19A, A24R, A24, A23, A23-19, B23, B19…

## Registered aircraft it may apply to (OpenAirDocs)

Matched by airframe and engine model; the AD's applicability may narrow it by serial number, part number or equipment.

- Aircraft: 1,349 (1,349 by airframe model, 0 by engine model)
- Makers: Beech 1,349

Models with the most aircraft:

- [Beech C23](https://openairdocs.org/model/beech-c23): 456 aircraft (airframe model)
- [Beech 23](https://openairdocs.org/model/beech-23): 147 aircraft (airframe model)
- [Beech B19](https://openairdocs.org/model/beech-b19): 145 aircraft (airframe model)
- [Beech A23-24](https://openairdocs.org/model/beech-a23-24): 121 aircraft (airframe model)
- [Beech B24R](https://openairdocs.org/model/beech-b24r): 117 aircraft (airframe model)
- [Beech A23](https://openairdocs.org/model/beech-a23): 85 aircraft (airframe model)
- [Beech A23-19](https://openairdocs.org/model/beech-a23-19): 72 aircraft (airframe model)
- [Beech B23](https://openairdocs.org/model/beech-b23): 62 aircraft (airframe model)
- [Beech A23A](https://openairdocs.org/model/beech-a23a): 51 aircraft (airframe model)
- [Beech A24R](https://openairdocs.org/model/beech-a24r): 49 aircraft (airframe model)
- [Beech 19A](https://openairdocs.org/model/beech-19a): 41 aircraft (airframe model)
- [Beech B-19 SPORT](https://openairdocs.org/model/beech-b-19-sport): 2 aircraft (airframe model)
- [Beech C 23](https://openairdocs.org/model/beech-c-23): 1 aircraft (airframe model)

All 13 models: https://openairdocs.org/ad/75-17-37/models.md
Every aircraft: https://openairdocs.org/ad/75-17-37/aircraft.md

Its text cites no advisory circulars or STCs.

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