STC SA2-1522

United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate Number 572-1522 This certificate issued to: Signature Flight Support Corporation, a Delaware Corporation 7511 Lemmon Avenue, Hangar C Dallas, TX 75209 Part SR407 of the Civil Ai x Regulations Original Product Type Certificate Number: 723 Make: Lockheed Model: 18 Description of Type Design Change:

Modification of power plant installation on aircraft equipped with cne of the following engine propeller combinations; Wright 1820-56A, 72A, or 66 with 33D50/6259-12, 6459/12, 6511-12, 6505-12, or 65259-12 propellers in accordance with Master Drawing List No. SD600000-1E dated 10/11/65, or later FAA approved revision.

This modification is eligible on Howard 250 (L-18 modified) and part of the basic H250 Tri-Gear configurations.

Compatibility of this modification with other previously apprcved modifications must be determined by the installer.

Date of Application: July 19, 1962 Date Reissued: 9/4/92; 12/21/98; 8/31/00 Date of Issuance: September 20, 1962 Date Amended: May 20, 1982 Rev. 9 FEDERAL AVIATION By Direction of the Administrator for sangeries cox (Signature) TOMNISTRATO Manager, Special Certification Office, Southwest Region (Title)

TRANSFER ENDORSEMENT Transfer the ownership of Supplemental Type Certificate Number to (Name of transferee) (Address of transferee) (Number and street) (City, State, and 21P code ) from (Name of grantor) (Print or type) - (Address of grantor) (Number and street) ( City, State, and 21P code ) Extent of Authority (if licensing agreement): - Date of Transfer:

Signature of grantor (In ink):

FAA AC 69-5536