AD 76-17-01

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.