# AD 90-03-04: High Pressure Turbine Rotor Discs

- Type: Airworthiness directive
- Status: Current
- Products: Honeywell International TFE731-3, TFE731-3A, TFE731-3AR and TFE731-3R
- Effective: February 22, 1990
- Superseded by: Nothing supersedes this AD
- Product type: Engine
- Amendment: 39-6419
- Registered aircraft: 1,039 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/755FF30FC4007796862568420074C76C.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/90-03-04

## The airworthiness directive

90-03-04 GARRETT ENGINE DIVISION, (hereinafter called "GARRETT") ALLIED SIGNAL INCORPORATED: Amendment 39-6419. Applicability: Models TFE731-3, -3A, -3AR, and -3R turbofan engines equipped with high pressure turbine rotor (HPTR) discs, part numbers 3072316-2, -3, and 3073110-1, -2. Compliance: Required as indicated, unless already accomplished. To prevent an uncontained engine failure, accomplish the following: (a) Remove and replace with a serviceable part, specific serial number HPTR discs, in accordance with the accomplishment instructions in Garrett Alert Service Bulletin TFE731-A72-3388, dated February 28, 1989, at next access to the turbine rotor assembly or within 150 operating cycles after the effective date of this AD or prior to June 1, 1990, whichever occurs first. NOTES: (1) For the purpose of this AD, access to the turbine rotor assembly is defined as whenever the N1 turbine module is separated from the engine. (2) Discs inspected by Garrett as noted in Garrett Alert Service Bulletin TFE731-A72- 3388, dated February 28, 1989, and determined to be airworthy may be returned to service. (b) Aircraft may be ferried in accordance with the provisions of FAR 21.197 and 21.199 to a base where the AD can be accomplished. (c) Upon submission of substantiating data by an owner or operator through an FAA Airworthiness Inspector, an alternate means of compliance with the requirements of this AD or adjustments to the compliance times specified in this AD may be approved by the Manager, Los Angeles Aircraft Certification Office, Federal Aviation Administration, Transport Airplane Directorate, Aircraft Certification Service, 3229 East Spring Street, Long Beach, California 90806-2425. This amendment (39-6419, AD 90-03-04) becomes effective on February 22, 1990.

## Affected data sheets (1) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS E6WE](https://openairdocs.org/tcds/E6WE): Honeywell Aerospace US LLC; names 4 of 23 models: TFE731-3, TFE731-3A, TFE731-3R, TFE731-3AR

## 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: 1,039 (0 by airframe model, 1,039 by engine model)
- Makers: Dassault-Breguet 177, Raytheon 153, Cessna 138, Learjet 137, Gates Learjet 123, Dassault 90, Israel Aircraft Industries 85, British Aerospace 48, Raytheon Corporate Jets 27, Gates Lear Jet 23

Models with the most aircraft:

- [Garrett TFE731 series](https://openairdocs.org/engine/garrett-tfe731-series): 694 aircraft (engine model)
- [Honeywell TFE-731-SER series](https://openairdocs.org/engine/honeywell-tfe-731-ser-series): 291 aircraft (engine model)
- [Alliedsign TFE731 series](https://openairdocs.org/engine/alliedsign-tfe731-series): 17 aircraft (engine model)
- [Garrett TFE731-3](https://openairdocs.org/engine/garrett-tfe731-3): 9 aircraft (engine model)
- [Honeywell TFE-731 series](https://openairdocs.org/engine/honeywell-tfe-731-series): 8 aircraft (engine model)
- [Garrett TFE731-3A](https://openairdocs.org/engine/garrett-tfe731-3a): 6 aircraft (engine model)
- [Honeywell TFE731-3](https://openairdocs.org/engine/honeywell-tfe731-3): 5 aircraft (engine model)
- [Honeywell TFE731-3AR](https://openairdocs.org/engine/honeywell-tfe731-3ar): 4 aircraft (engine model)
- [Honeywell TFE731-3R](https://openairdocs.org/engine/honeywell-tfe731-3r): 2 aircraft (engine model)
- [Alliedsign TFE731-3R](https://openairdocs.org/engine/alliedsign-tfe731-3r): 1 aircraft (engine model)
- [Garrett TFE731-3R](https://openairdocs.org/engine/garrett-tfe731-3r): 1 aircraft (engine model)
- [Garrett TFE731-3AR](https://openairdocs.org/engine/garrett-tfe731-3ar): 1 aircraft (engine model)

All 12 models: https://openairdocs.org/ad/90-03-04/models.md
Every aircraft: https://openairdocs.org/ad/90-03-04/aircraft.md

Its text cites no advisory circulars or STCs.

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