STC SA1858NM

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

DBA GARRETT AVIATION SERVICES 6201 WEST IMPERIAL HIGHWAY LOS ANGELES, CA 90045 Part *25 of the Federal Aviation Regulations. (*For certification basis see continuation sheet) Original Product Type Certificate Number:

A12EA Gulfstream American Corporation G-1159A Description of Type Design Change: Installation of dual Sperry EDZ-800/801 Electronic Flight Instrument Systems in accordance with FAA sealed Western Commander, Inc., Top Drawing No. 070000023, Revision “D”, dated May 29, 1983, or later FAA sealed revision.

The applicable FAA approved Western Commander, Inc., Airplane Flight Manual Supplements are listed on the appropriate FAA sealed Western Commander Top Drawing and are required with this modification.

Limitations and Conditions: The approval of this change in type design applies basically to Gulfstream American Model G-1159A airplanes only. This approval should not be extended to other aircraft of these models 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.

Date of application : March 8, 1983

Date of issuance: June 3, 1983

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

Date amended: March 13, 1984, February 13, 1985

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

(Title)

United States Of America Department of Transportation - Federal Aviation Administration Supplemental Type Certificate (Continuation Sheet) Number SA1858NM

Date of Issuance: June 3, 1983 Date Amended: March 13, 1984, February 13, 1985 Date Reissued: December 20, 1984, July 30, 2003

CERTIFICATION BASIS

This certification basis for this modification is as follows:

FAR 25. 1301 FAR 25. 1303 FAR 25. 1309 Amendment 25-41 FAR 25. 1321 FAR 25. 1333 FAR 25. 1335

in addition to the basic requirements called out on T.C. Data Sheet No. A12EA.

Limitation and Conditions (continued)

Each airplane must have an independent third attitude indicator meeting the requirements for FAR Part 121.1305(j), installed and operating. 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.

-END-