STC SA09763DS

FAA Form 8110-2 (10/20) SUPERSEDES PREVIOUS EDITION Page 1 of ___ United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate Number:

Part of .

SA09763DS S-TEC Corporation One S-TEC Way Mineral Wells, Texas 76067-9236 23 Code of Federal Regulations

2A4 and 6A1 Twin Commander 500, 500A, 500B, 500S, 500U, 560A, 560E, 560F, 680E, 680F, 680T, 680V, 680W, 681, 685, 690, 690A, 690B, 690C, 690D, 695 and 695A

1. Installation of an S-TEC 01326 Digital Flight Control System (DFCS), in accordance with Master Data List ST-983-MDL-0001, Revision A, dated 12-21-20 or later FAA approved revision.

2. Airplane Flight Manual Supplement ST-983-AFMS-0001, Rev. -, dated 12-22-20, or later FAA approved revision is required.

3. Instructions for Continued Airworthiness ST-983-ICA-0001, Rev. -, dated 12-17-20, or later FAA approved revision is required.

1. This STC is applicable to all serial numbers for Twin Commander Aircraft LLC Models 500, 500A, 500B, 500S, 500U, 560A, 560E, 560F, 680E, 680F, 680T, 680V, 680W, 681, 685, 690, 690A, 690B, 690C, 690D, 695 and 695A. (See continuation sheet 3) 09/29/2020 12/22/2020

Lead ODA administrator 3

FAA Form 8110-2 (10/20) SUPERSEDES PREVIOUS EDITION Page 2 of ___ United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate Number:

SA09763DS 3

FAA Form 8110-2 (10/20) SUPERSEDES PREVIOUS EDITION Page ___ of ___ United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate (Continuation Sheet) Number:

SA09763DS Limitations and Conditions:

2. The installer must determine whether this design change is compatible with previously approved modifications.

3. If the holder agrees to permit another person to use this certificate to alter a product the holder must give the other person written evidence of that permission.

4. Certification Basis: Compliance determination used for this STC FAR 23.143 Amdt 23-0 FAR 23.773(a)(1) Amdt 23-0 FAR 23.301 Amdt 23-0 FAR 23.777(a)(b) Amdt 23-0 FAR 23.303 Amdt 23-0 FAR 23.867(a)(b) Amdt 23-7 FAR 23.305 Amdt 23-0 FAR 23.1301 Amdt 23-62 FAR 23.307 Amdt 23-0 FAR 23.1306 Amdt 23-61 FAR 23.395(a)(1) Amdt 23-0 FAR 23.1308(a)(b)(c) Amdt 23-57 FAR 23.397 Amdt 23-17 FAR 23.1309 Amdt 23-62 FAR 23.561(b)(e) Amdt 23-0 FAR 23.1322 Amdt 23-17 FAR 23.601 Amdt 23-0 FAR 23.1329 Amdt 23-0 FAR 23.603 Amdt 23-0 FAR 23.1335 Amdt 23-20 FAR 23.605 Amdt 23-0 FAR 23.1351(a) Amdt 23-0 FAR 23.607 Amdt 23-17 FAR 23.1357(a)(b)(c)(d) Amdt 23-0 FAR 23.609 Amdt 23-0 FAR 23.1365 Amdt 23-0 FAR 23.611 Amdt 23-0 FAR 23.1367 Amdt 23-0 FAR 23.613 Amdt 23-0 FAR 23.1381(a) Amdt 23-0 FAR 23.619 Amdt 23-0 FAR 23.1431 Amdt 23-62 FAR 23.625(a) Amdt 23-0 FAR 23.1501(c) Amdt 23-0 FAR 23.627 Amdt 23-0 FAR 23.1525 Amdt 23-0 FAR 23.671 Amdt 23-0 FAR 23.1529 Amdt 23-26 FAR 23.677(a)(b) Amdt 23-0 FAR 23.1541(a)(2)(b) Amdt 23-0 FAR 23.685 Amdt 23-0 FAR 23.1581 Amdt 23-0 FAR 23.689 Amdt 23-0 FAR 23.1583(a)(h) Amdt 23-0 FAR 23.693 Amdt 23-0 FAR 23.1585(a) Amdt 23-0 FAR 23.771(a) Amdt 23-0 FAR 23.2540(b) Amdt 23-64

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