STC SA3321WE

This Certificate issued to GE ENGINE SERVICES - CORPORATE AVIATION, INC.

DBA GARRETT AVIATION SERVICES 6201 WEST IMPERIAL HIGHWAY LOS ANGELES, CA 90045 Part *4b of the Civil Air Regulations *(For Certification basis see Type Certificate Data Sheet A12EA) Original Product Type Certificate Number:

A12EA Grumman American G-1159

Description of Type Design Change: Installation of Canadian Marconi Vertical Scale Engine Instruments in accordance with FAA sealed Western Commander, Inc. Drawing List 02000016, Revision “A”, dated January 4, 1977, or later FAA sealed revision. FAA approved Airplane Flight Manual Supplement dated January 4, 1977, or later FAA approved revision is required.

Limitations and Conditions: The approval of this change in type design applies to Grumman Model G- 1159 airplanes only. This approval should not be extended to other aircraft of this model on which other previously approved modifications are incorporated unless it is determined by the installer that the interrelationship between this change and any of those other previously approved modifications will introduce no adverse effect upon the airworthiness of that aircraft. If the holder agrees to permit another person to use this certificate to alter the product, the holder shall give the other person written evidence of that permission. A copy of this STC must be included in the permanent records of the modified aircraft.

Date of application :November 5, 1976

Date of issuance: January 4, 1977

Date reissued: December 20, 1994, July 30, 2003

( Signature) Manager, Technical & Administrative Support Staff, Los Angeles Aircraft Certification Office

(Title)