STC SA3280NM

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

A12EA Gulfstream Aerospace Corp.

G-1159, and G-1159B Description of Type Design Change Installation of triple Honeywell Inertial Reference Systems and Triple Universal Flight Management Systems in accordance with FAA sealed Western Commander, Inc. Top Drawing No. 02000043 Revision “A” dated July 1, 1986, or later FAA sealed revision.

Applicable FAA Approved Western Commander Airplane Flight Manual Supplements are listed on the appropriate Western Commander Top Drawing.

Limitations and Conditions The approval of the change in type design applies basically to the listed model 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 :May 12, 1986

Date of issuance: September 17, 1986

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

Date amended: August 2, 1990

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

(Title)