# AD 71-25-03: Fuel and Oil Restrictor

- Type: Airworthiness directive
- Status: Current
- Products: Textron 19A, A23-24, A23A, A24, A24R, B19, B23, C23 and M19A
- Effective: December 3, 1971
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Small airplane
- Amendment: 39-1351
- Registered aircraft: 928 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/B35E1F6AB22CA61C86256A080071C720.0001
- DRS record last changed: January 21, 2026
- Page: https://openairdocs.org/ad/71-25-03

## The airworthiness directive

71-25-03 BEECH: Amdt. 39-1351. Applies to Models A23A, B23, C23 (Serial Numbers M-1069 thru M-1310); Models 19A, M19A, B19 (Serial Numbers MB-289 thru MB-500); Models A23-24 and A24 (Serial Numbers MA-273 thru MA-368); and Models A24R (Serial Numbers MC-3 thru MC-72, except MC-22, MC-23, MC-39, MC-43, MC-63, MC-64 and MC- 71) airplanes, and to other serial numbers of those model airplanes listed herein which have had the fuel and/or the oil pressure instrument lines replaced with the Beech Part No. 130524-3 fire sleeved lines.

Compliance: Required as indicated, unless already accomplished.

To eliminate a hazard to the safe operation of these airplanes, within the next 100 hours' time in service after the effective date of this AD, or at the next annual inspection, whichever occurs first, accomplish the following:

Install fuel restrictor assembly and oil restrictor assembly at appropriate engine positions in accordance with Beechcraft Service Instruction 0411-240, Rev. 1, or a later approved revision. Equivalent methods of compliance are satisfactory if referred to and approved by the Chief, Engineering and Manufacturing Branch, FAA, Central Region.

This amendment becomes effective December 3, 1971.

## 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 9 of 14 models: A23-24, M19A, A24R, A24, B23, B19, A23A, 19A…

## 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: 928 (928 by airframe model, 0 by engine model)
- Makers: Beech 928

Models with the most aircraft:

- [Beech C23](https://openairdocs.org/model/beech-c23): 456 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 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 9 models: https://openairdocs.org/ad/71-25-03/models.md
Every aircraft: https://openairdocs.org/ad/71-25-03/aircraft.md

Its text cites no advisory circulars or STCs.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.