# AD 74-26-05: Fuel Control Units

- Type: Airworthiness directive
- Status: Current
- Products: Pratt & Whitney Canada JT15D-1 and JT15D-4
- Effective: January 2, 1975
- Superseded by: Nothing supersedes this AD
- Product type: Engine
- Amendment: 39-2046
- Registered aircraft: 516 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/21A6D98B9BB0A5FC8625682C00562F32.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/74-26-05

## The airworthiness directive

74-26-05 PRATT & WHITNEY AIRCRAFT and UNITED AIRCRAFT OF CANADA, LIMITED: Amendment 39-2046. Applies to all Pratt & Whitney Aircraft and United Aircraft of Canada Limited JT15D-1 and JT15D-4 turbofan engines containing fuel control P/Ns 3022332 and 3023349.

Compliance required within the next 25 hours time in service after the effective date of this AD unless already accomplished.

To prevent fuel leaks, inspect fuel control units for possible interference between the fuel outlet housing and the fuel control main body by placing a .003 inch feeler gage between the mating faces of the fuel outlet housing (P/N 3240082) and the fuel control main body (P/N 3240451). If the feeler gage can be inserted between the mating faces, replace fuel control with dimensionally correct fuel control prior to next flight.

United Aircraft of Canada Limited's Special Instruction No. 3-74, dated September 20, 1974, pertains to this subject.

This amendment becomes effective January 2,1975.

## 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: 516 (0 by airframe model, 516 by engine model)
- Makers: Cessna 493, Mitsubishi 16, Beech 2, Raytheon 2, SIAI Marchetti 2, Gulfstream Aerospace 1

Models with the most aircraft:

- [Pratt & Whitney Canada JT15D-4 series](https://openairdocs.org/engine/pratt-whitney-canada-jt15d-4-series): 357 aircraft (engine model)
- [Pratt & Whitney Canada JT15D-1 series](https://openairdocs.org/engine/pratt-whitney-canada-jt15d-1-series): 159 aircraft (engine model)

All 2 models: https://openairdocs.org/ad/74-26-05/models.md
Every aircraft: https://openairdocs.org/ad/74-26-05/aircraft.md

Its text cites no advisory circulars or STCs.

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