STC SE5511NM

N umber SE5511NM This certificate issued to

Part 13 of the Civil Air R egulations .

Original Product -- Type Certificate N umber :

Installation of Aeronautical Accessories, Inc. Compressor Discharge Pressure (Pc) Valve, in accordance with Aeronautical Accessories, Inc. Drawing List AA-92015, dated February 24, 1992, or later FAA approved revision.

The installer must determine whether this design change is compatible with previously approved modifications. If the holder agrees to permit another person to use this certificate to alter a product, the holder must give the other person written evidence of that permission. A copy of this STC must be included in the permanent records of the modified engine.

Bell Helicopter Textron, Inc.

441 Industrial Park Road Piney Flats, TN 37686 E4CE M ake : Rolls-Royce Corporation M odel : 250-C20, -C20B, -C20F, -C20J, -C20R, -C20C, -C20S, -C20R/1, -C20R/2, -C20R/4, -C20W Date of application : October 10, 1990

Date of issuance : December 11, 1991

Date reissued : February 19, 1992;

May 29, 2013

Date amended : March 3, 1992, October 5, 1992

B y direction of the A dministrator

(Signature) Scott A. Horn, Acting Manager, Rotorcraft Certification Office, Southwest Region

(Title)

FAA Form 8110-2-1(10-69) Page 2 of 2