# AD 82-13-03: Modify Engine High Pressure Fuel Control Filter Assembly

- Type: Airworthiness directive
- Status: Current
- Products: Rolls-Royce 250-C20 and 250-C20B
- Effective: July 1, 1982
- Superseded by: Nothing supersedes this AD
- Product type: Engine
- Amendment: 39-4403
- Registered aircraft: 1,033 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/B2AB9BB4F4DC8EE28625683F006C70D2.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/82-13-03

## The airworthiness directive

82-13-03 DETROIT DIESEL ALLISON: Amendment 39-4403. Applies to all Models 250-C20 and -C20B engines equipped with the Chandler Evans Company (CECO) Model MC-40 fuel control system. Compliance required as indicated unless already accomplished. To prevent possible power turbine overspeed, accomplish the following at the next engine or CECO fuel control/power turbine governor overhaul, but not later than October 1, 1982: Modify the engine high pressure fuel control filter assembly, P/N 6895173 or P/N 6896727, into P/N 6899279 in accordance with the detailed instructions provided in Detroit Diesel Allison Commercial Engine Alert Bulletin CEB-A-1144, Revision 3, dated March 1, 1982, or later FAA approved revision. Upon request of the operator, an equivalent means of compliance with the requirements of this AD may be approved by the Chief, Chicago Aircraft Certification Office, Federal Aviation Administration, Central Region. The manufacturer's specifications and procedures identified and described in this directive are available upon request to Detroit Diesel Allison, Division of General Motors Corporation, Indianapolis, Indiana 46206. These documents may also be examined at the New England Regional Office, 12 New England Executive Park, Burlington, Massachusetts 01803. A historical file on this AD is maintained by the FAA at the New England Regional Office. This amendment becomes effective July 1, 1982.

## Affected data sheets (1) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS E4CE](https://openairdocs.org/tcds/E4CE): Rolls-Royce Corporation; names 2 of 23 models: 250-C20, 250-C20B

## 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: 1,033 (0 by airframe model, 1,033 by engine model)
- Makers: Bell 554, Hughes Helicopters 145, Mcdonnell Douglas Helicopter 79, MD Helicopters 43, Hughes 33, Hiller 23, Agusta 21, Bell Helicopter Textron 20, Messerschmitt-Bolkow-Blohm 13, Aerospatiale 12

Models with the most aircraft:

- [Allison 250-C20 series](https://openairdocs.org/engine/allison-250-c20-series): 530 aircraft (engine model)
- [Rolls-Royce 250-C20B](https://openairdocs.org/engine/rolls-royce-250-c20b): 215 aircraft (engine model)
- [Allison 250-C20B](https://openairdocs.org/engine/allison-250-c20b): 113 aircraft (engine model)
- [Allison 250 series](https://openairdocs.org/engine/allison-250-series): 79 aircraft (engine model)
- [Allison 250-C20](https://openairdocs.org/engine/allison-250-c20): 54 aircraft (engine model)
- [Rolls-Royce 250-C20](https://openairdocs.org/engine/rolls-royce-250-c20): 42 aircraft (engine model)

All 7 models: https://openairdocs.org/ad/82-13-03/models.md
Every aircraft: https://openairdocs.org/ad/82-13-03/aircraft.md

Its text cites no advisory circulars or STCs.

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