STC SA09215AC-D

United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate Number: SA09215 AC-D This certificate issued to: S-TEC Corporation One S-TEC Way Mineral Wells Municipal Airport Mineral Wells, TX 76067-9236 Certifies that the change in the type design for the following product with the limitations and conditions therefor as specifed hereon meets the anworthiness regurements of Part 3 of the Civil stir Regulations.

Original Product I ype berlificate Number: 3A17 Make: Cessna Model: R172K Description of Type Design Change:

Installation of S-TEC System 30 ALT Altitude Hold System, Model ST-673, according to Bulletin No. 773, dated 5-09-97 and Master Drawing List No. 92991, dated 5-09-97 or later FAA Approved revisions of the above data (28 Volt System).

1. FAA/DAS Approved Pilot's Operating Handbook and/or Airplane Flight Manual Supplement, P/N 891377, dated 5-16-97, is required for Cessna Model R172K or later FAA Approved revisions of the above supplement.

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

Date of Application: 5-12-97 Date of isranoe: 5-16-97

FEDERAL AVIATION Date Reissued:

By Direction of the Administrator Wice Homer TOMINSTRATION DAS Staff Coordinator, DAS 5 SW William J. Thomas (Title)

The FAA will reissue the certificate in the name of the transferee and forward it to him

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 2IP code) Extent of Authority (if licensing agreement):

Signature of grantor (In ink):