# AD 73-19-07: Turbine Governor-To-Fuel Control Tube

- Type: Airworthiness directive
- Status: Current
- Products: Rolls-Royce 250-C20
- Effective: September 14, 1973
- Superseded by: Nothing supersedes this AD
- Product type: Engine
- Amendment: 39-1715
- Registered aircraft: 705 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/93159658937D5A78862568270067075C.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/73-19-07

## The airworthiness directive

73-19-07 DETROIT DIESEL ALLISON: Amdt. 39-1715. Applies to Detroit Diesel Allison Model 250- C20 engine. Compliance required within the next fifty hours time in service unless already accomplished. To prevent failure of the P/N 6875621 power turbine governor-to-fuel control fuel tube, install the fuel tube supports specified in Allison Commercial Engine Bulletin 250-C20 CEB-1040, dated May 10, 1973, Revision 1, dated June 28, 1973, or later FAA approved revisions or an equivalent procedure approved by the Chief, Engineering and Manufacturing Branch, Great Lakes Region. This amendment is effective September 14, 1973.

## 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 1 of 23 models: 250-C20

## 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: 705 (0 by airframe model, 705 by engine model)
- Makers: Bell 425, Hughes Helicopters 62, Mcdonnell Douglas Helicopter 62, Hughes 24, Hiller 20, Agusta 18, MD Helicopters 18, Aerospatiale 11, Enstrom Helicopter 10, Cessna 8

Models with the most aircraft:

- [Allison 250-C20 series](https://openairdocs.org/engine/allison-250-c20-series): 530 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 5 models: https://openairdocs.org/ad/73-19-07/models.md
Every aircraft: https://openairdocs.org/ad/73-19-07/aircraft.md

Its text cites no advisory circulars or STCs.

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