# AD 80-03-06: Stage 2 HPT Disks

- Type: Airworthiness directive
- Status: Current
- Products: General Electric CF6-6D, CF6-6D1, CF6-6D1A, CF6-6K and CF6-6K2
- Effective: February 8, 1980
- Superseded by: Nothing supersedes this AD
- Product type: Engine
- Amendment: 39-3683
- Registered aircraft: 11 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/2D4B94731D8B6A1A8625685F006B3F51.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/80-03-06

## The airworthiness directive

80-03-06 GENERAL ELECTRIC: Amendment 39-3683. Applies to General Electric CF6-6 series engines, Stage 2 HPT disks, Part Numbers 9083M48P01, 9084M52P02, 9084M52P05, 9137M15P01, and 9137M15P02. Compliance is required as indicated. To preclude disk failure due to fatigue, these disks are to be removed from service as follows:

  (a) All disks, except those noted in (c) below, which have more than 8400 cycles on the effective date of this AD are to be removed from service within 100 cycles.

  (b) All disks, except those noted in (c) below, which have less than 8400 cycles are to be removed before they accrue 8500 cycles.

  (c) Those disks, P/N 9137M15P02, with Serial Numbers MP036073, MP030786, MP030797, MP035005, and RPO24722 because of their refurbishment schedule shall be removed from service before they accrue 8800 cycles.

  (d) Other disks than those identified in (c) above may be allowed additional cycles on an individual basis when approved by the Chief, Engineering and Manufacturing Branch, FAA, Great Lakes Region.

CF6-6 Service Bulletin 72-761 dated November 28, 1979 also applies to this subject.

This amendment becomes effective on February 8, 1980.

## Affected data sheets (1) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS E23EA](https://openairdocs.org/tcds/E23EA): General Electric Company; names 5 of 18 models: CF6-6D1A, CF6-6D, CF6-6D1, CF6-6K, CF6-6K2

## 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: 11 (0 by airframe model, 11 by engine model)
- Makers: Boeing 6, Mcdonnell Douglas 3, Airbus Industrie 2

Models with the most aircraft:

- [GE CF6-6 series](https://openairdocs.org/engine/ge-cf6-6-series): 9 aircraft (engine model)
- [GE CF6-6D](https://openairdocs.org/engine/ge-cf6-6d): 2 aircraft (engine model)

All 2 models: https://openairdocs.org/ad/80-03-06/models.md
Every aircraft: https://openairdocs.org/ad/80-03-06/aircraft.md

Its text cites no advisory circulars or STCs.

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