# AD 79-13-09: Compressor Rotor Spools

- Type: Airworthiness directive
- Status: Current
- Products: General Electric CF6-50A, CF6-50C, CF6-50C1, CF6-50C2, CF6-50C2B, CF6-50C2D, CF6-50CA, CF6-50E, CF6-50E1, CF6-50E2 and CF6-50E2B
- Superseded by: Nothing supersedes this AD
- Product type: Engine
- Amendment: 39-3508
- Registered aircraft: 20 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/5CB416B296945BCF8625685B005CEFD3.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/79-13-09

## The airworthiness directive

79-13-09 GENERAL ELECTRIC: Amendment 39-3508. Applies to General Electric Model CF6-50 series engines containing stage 3-9 high pressure compressor rotor spools P/N 9081M49 (serial numbers as specified in the body of this AD) installed in, but not limited to certain McDonnell Douglas DC-10, Boeing 747, and Airbus Industries A-300 series aircraft certificated in all categories. Due to design differences, this AD does not affect CF6-6 series engines.

Compliance required within the next 30 calendar days after the effective date of this AD, unless previously accomplished.

To preclude possible engine failure resulting from compressor rotor spool fatigue cracking, remove from service stage 3-9 high pressure compressor rotor spools P/N 9081M49, Serial Numbers A0436, A0570, A0581, A0590, A0432 and A0443.

This amendment becomes effective upon publication in the Federal Register.

## 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 11 of 18 models: CF6-50E1, CF6-50CA, CF6-50A, CF6-50E, CF6-50C2D, CF6-50C1, CF6-50E2B, CF6-50C2…

## 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: 20 (0 by airframe model, 20 by engine model)
- Makers: Mcdonnell Douglas 17, Mcdonnell-Douglas 2, Bombardier 1

Models with the most aircraft:

- [GE CF6-50C2](https://openairdocs.org/engine/ge-cf6-50c2): 10 aircraft (engine model)
- [GE CF6-50 series](https://openairdocs.org/engine/ge-cf6-50-series): 9 aircraft (engine model)
- [GE CF6-50C](https://openairdocs.org/engine/ge-cf6-50c): 1 aircraft (engine model)

All 3 models: https://openairdocs.org/ad/79-13-09/models.md
Every aircraft: https://openairdocs.org/ad/79-13-09/aircraft.md

Its text cites no advisory circulars or STCs.

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