# AD 76-17-01: High Pressure Compressor

- Type: Airworthiness directive
- Status: Current
- Products: General Electric CF6-50A, CF6-50C, CF6-50E and CF6-50E1
- Effective: August 20, 1976
- Superseded by: Nothing supersedes this AD
- Product type: Engine
- Amendment: 39-2696
- Registered aircraft: 10 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/53EA70A91CAFA54E8625685B005C7B69.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/76-17-01

## The airworthiness directive

76-17-01 GENERAL ELECTRIC: Amendment 39-2696. Applies to Models CF6-50A, CF6-50C, CF6- 50D, CF6-50E, CF6-50E1, and CF6-50H Turbofan Engines.

Compliance required by June 1, 1977, unless previously accomplished.

To prevent excessive overpressure in the high pressure compressor, accomplish the following in accordance with General Electric Service Bulletin (CF6-50) 72-412, Revision 1, or subsequent FAA Approved Revision thereto:

  (a) Remove the fan stator stages 1, 2 and 3 inner shrouds, stage 2 outer shroud and stages 2 and 3 cases with abradable epoxy resin.

  (b) Replace with new or reworked parts incorporating aluminum honeycomb material. The manufacturer's specifications and procedures identified and described in this directive are incorporated herein and made a part hereof pursuant to 5 U.S.C. 552(a)(1). All persons affected by this directive who have not already received these documents from the manufacturer may obtain copies upon request to General ElectricCompany, Cincinnati, Ohio 45215. These documents may also be examined at the FAA Great Lakes Region, 2300 East Devon Avenue, Des Plaines, Illinois 60018 and at FAA Headquarters, 800 Independence Avenue, S.W., Washington, D.C. A historical file on this AD which includes the incorporated material in full is maintained by the FAA at its headquarters in Washington, D.C., and at the Great Lakes Region.

This amendment becomes effective August 20, 1976.

## 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 4 of 18 models: CF6-50E1, CF6-50A, CF6-50E, CF6-50C

## 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: 10 (0 by airframe model, 10 by engine model)
- Makers: Mcdonnell Douglas 7, Mcdonnell-Douglas 2, Bombardier 1

Models with the most aircraft:

- [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 2 models: https://openairdocs.org/ad/76-17-01/models.md
Every aircraft: https://openairdocs.org/ad/76-17-01/aircraft.md

Its text cites no advisory circulars or STCs.

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