STC SA09357AC-D

United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate Number 5A09357 AC-D This certificate issued to: S-TEC Corporation One S-TEC Way Mineral Wells Municipal Airport Mineral Wells, TX 76067-9236 9 art 3 of the Cirt Is Regulations.

Original Product I ype Cerlifcate Number: 3A25 Make: Cessna Model: 320B, 320C, 320D, 320E, and 320F Description of Type Design Change:

Installation of S-TEC System 30 ALT Altitude Hold System, Model ST-813, according to Bulletin No.

913, dated 4-08-98 and Master Drawing List No. 921088, dated 4-08-98 or later FAA Approved revisions of the above data (28 Volt System).

FAA/DAS Approved Supplemental Flight Manual, P/N 891714, is required for Cessna Models 320B, 320C, 320D, 320E, and 320F or later FAA Approved revisions of the above supplement.

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

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.

suspended, revoked or a termination date is otherese established by the Administrator of the Federal I viation Administration.

Date of Application: 4-09-98 Date Amended:

Date of Issuance: 4-13-98 By Direction of the Administrator FEDERAL AVIATION (Signature) TMINISTRATIOR William J. Thomas DAS Staff Coordinator, DAS 5 SW (Title)

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

Signature of grantor (In ink):