STC SE00057AT

N umber SE00057AT This certificate issued to

Part 33 of the Federal Aviation R egulations .

effective February 1, 1965, and amendments 33-2, 33-3, 33-4 (See Type Certificate Data Sheet)

Original Product -- Type Certificate N umber :

Installation of Aeronautical Accessories, Inc., “Pc Safety Valve Kit” in accordance with Aeronautical Accessories, Inc. Installation/Operation/Maintenance Instructions Report No. AA-92082 dated September 9, 1992, or later FAA approved revision.

The approval of this change in type design is restricted to the engines identified above only. 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.

This certificate and the supporting data which is the basis for appro val shall remain in effect until surrendered, suspended, revoked or a termination date is otherwise established by the A dministrator of the F ederal A viation A dministration.

Bell Helicopter Textron, Inc.

441 Industrial Park Road Piney Flats, TN 37686 E1GL M ake : Rolls-Royce Corporation M odel : 250-C28, -C28B, -C28C, -C30, -C30G, -C30M, -C30P, -C30R, -C30S, -C30U Date of application : July 1, 1992

Date of issuance : December 16, 1992

Date reissued : May 29, 2013

Date amended : December 7, 1993

B y direction of the A dministrator

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

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