# AD 88-10-01: Fuel Boost Pump

- Type: Airworthiness directive
- Status: Current
- Products: Textron A23-24, A24, A24R, B24R and C24R
- Effective: June 6, 1988
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Small airplane
- Amendment: 39-5904
- Registered aircraft: 463 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/C94D9A26C34E13C1862569B3005294BF.0001
- DRS record last changed: January 21, 2026
- Page: https://openairdocs.org/ad/88-10-01

## The airworthiness directive

88-10-01 BEECH: Amendment 39-5904. Applies to Models A23-24 and A24 (Serial Numbers (S/Ns) MA-1 through MA-368); Model A24R (S/Ns MC-2 through MC-95); Models A24R, B24R, and C24R (S/Ns MC-96 through MC-795), airplanes certificated in any category.

Compliance: Required within the next 100 hours time-in-service after the effective date of this AD, unless already accomplished.

To prevent reduction or loss of engine power due to fuel flow blockage resulting from broken electric fuel boost pump vanes in the engine driven fuel pump, accomplish the following:

  (a) For airplanes with 14 volt electrical systems, replace the existing electric fuel boost pump with a Beech P/N 1816-00-1 pump in accordance with the instructions in Beech Service Bulletin (MSB) No. 2217, dated February 1988.

  (b) For airplanes with 28 volt electrical systems, replace the existing electric fuel boost pump with a Beech P/N 1817-00-1 pump in accordance with the instructions in Beech MSB No. 2217,dated February 1988.

  (c) Airplanes may be flown in accordance with FAR 21.197 to a location where this AD may be accomplished.

  (d) An equivalent means of compliance with this AD may be used if approved by the Manager, Aircraft Certification Office, Federal Aviation Administration, 1801 Airport Road, Room 100, Mid-Continent Airport, Wichita, Kansas 67209.

All persons affected by this directive may obtain copies of the document(s) referred to herein upon request to Beech Aircraft Corporation, Commercial Service, Department 52, P.O. Box 85, Wichita, Kansas 67201-0085; or may examine the document(s) referred to herein at FAA, Office of the Regional Counsel, Room 1558, 601 East 12th Street, Kansas City, Missouri 64106.

This amendment becomes effective on June 6, 1988.

## 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 5 of 14 models: A23-24, A24R, A24, C24R, B24R

## 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: 463 (463 by airframe model, 0 by engine model)
- Makers: Beech 463

Models with the most aircraft:

- [Beech C24R](https://openairdocs.org/model/beech-c24r): 176 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 A24R](https://openairdocs.org/model/beech-a24r): 49 aircraft (airframe model)

All 4 models: https://openairdocs.org/ad/88-10-01/models.md
Every aircraft: https://openairdocs.org/ad/88-10-01/aircraft.md

Its text cites no advisory circulars or STCs.

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