# AD 90-23-05: Engine Aft Mount,

- Type: Airworthiness directive
- Status: Current
- Products: General Electric CF6-80A3
- Effective: December 3, 1990
- Superseded by: Nothing supersedes this AD
- Product type: Engine
- Amendment: 39-6773
- Docket: 90-ANE-08
- Registered aircraft: 237 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/4BB899DD174075168625686C00487A6B.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/90-23-05

## The airworthiness directive

90-23-05 GENERAL ELECTRIC COMPANY: Amendment 39-6773. Docket No. 90-ANE-08. Applicability: General Electric Company (GE) CF6-80A3 turbofan engines installed on, but not limited to, Airbus A310-200 aircraft. Compliance: Required at the next engine removal or within 18 months after the effective date of this AD, whichever occurs first, unless already accomplished. To prevent failure of the engine aft mount, which could result in engine separation, accomplish the following: (a) Conduct an "in shop" dip etch and fluorescent penetrant inspection of the engine aft upper mount beam, Part Number (P/N) 224-1606-501 or 224-1606-503, and engine aft lower mount beam, P/N 224-1607-501, in accordance with the accomplishment instructions contained in Part 2 of GE CF6-80A Series Service Bulletin (SB) 71-053, Revision 2, dated June 26, 1990. (b) Remove from service prior to further flight, engine aft upper and lower mounts with crack indications and replace with serviceable parts.(c) 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. (d) Upon submission of substantiating data by an owner or operator through an FAA Airworthiness Inspector, an alternate method of compliance with the requirements of this AD or adjustments to the compliance (schedule) times specified in this AD may be approved by the Manager, Engine Certification Office, ANE-140, Engine and Propeller Directorate, Aircraft Certification Service, Federal Aviation Administration, 12 New England Executive Park, Burlington, Massachusetts 01803. The fluorescent penetrant inspection of engine aft mount beam assemblies shall be done in accordance with the following GE document:

DOCUMENT PAGE REVISION DATE GE SB 71-053 1, 2 2 June 26, 1990 GE SB 71-053 3-8 1 February 8, 1990 GE SB 71-053 9, 10, 11 2 June 26, 1990 GE SB 71-053 12 1

February 8, 1990

This incorporation by reference was approved by the Director of the Federal Register in accordance with 5 U.S.C. 552(a) and 1 CFR Part 51. Copies may be obtained from General Electric Aircraft Engines, CF6 Distribution Clerk, Room 132, 111 Merchant Street, Cincinnati, Ohio 45246. Copies may be inspected at the Regional Rules Docket, Office of the Assistant Chief Counsel, Federal Aviation Administration, New England Region, 12 New England Executive Park, Room 311, Burlington, Massachusetts 01803, or at the Office of the Federal Register, 1100 L Street, NW, Room 8301, Washington, DC 20591. This amendment (39-6773, AD 90-23-05) becomes effective on December 3, 1990.

## Affected data sheets (1) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS E13NE](https://openairdocs.org/tcds/E13NE): General Electric Company GE Aerospace; names 1 of 28 models: CF6-80A3

## 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: 237 (0 by airframe model, 237 by engine model)
- Makers: Boeing 157, Mcdonnell Douglas 45, Airbus Industrie 35

Models with the most aircraft:

- [GE CF6-80 series](https://openairdocs.org/engine/ge-cf6-80-series): 237 aircraft (engine model)

All 1 models: https://openairdocs.org/ad/90-23-05/models.md
Every aircraft: https://openairdocs.org/ad/90-23-05/aircraft.md

Its text cites no advisory circulars or STCs.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.