# STC SA576SW - Type: Supplemental type certificate - Status: Current, Reissued - Holder: Century Flight Systems Inc, United States - Description: Installation of Mitchell automatic flight system model AK186 consisting of Piper altimatic IIIB autopilot radio coupler, and automatic aileron stabilizer model AK179. - Applied: December 7, 1965 - Status date: June 25, 1984 - Product: Aircraft, Single-Engine - Certification basis: Part 21 - Data sheets: [TCDS 1A15](https://openairdocs.org/tcds/1A15), [TCDS A1EA](https://openairdocs.org/tcds/A1EA) - Certificate PDF: https://openairdocs.org/files/sha256/32/b7/32b71ec6d0ad0ad07e2d10fcf19a316e55fe962119de8aada2334f9e69648685 - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/B59E52E870AEC1E785256CC200122B54.0001 - DRS record last changed: December 5, 2025 - Page: https://openairdocs.org/stc/SA576SW ## ADs that name it (1) - [AD 70-15-18](https://openairdocs.org/ad/70-15-18): Automatic Pilot and Automatic Aileron Stabilizer Instruments · Mitchell Industries Auto Pilot Systems Instruments. Effective Aug 31, 1970. Cited in the text ## Approved models (3) - Piper Aircraft Inc. PA-24-250 ([TCDS 1A15](https://openairdocs.org/tcds/1A15)) - Piper Aircraft Inc. PA-24-260 ([TCDS 1A15](https://openairdocs.org/tcds/1A15)) - Piper Aircraft Inc. PA-30 ([TCDS A1EA](https://openairdocs.org/tcds/A1EA)) ## What the certificate says Read from the PDF's text layer, without the form's printed wording; the layout is lost and the order can differ. The PDF is the record. ^Department of transportation —Jp ederal 2toiation administration Supplemental TCpe Certificate tSKwmwr' SA576SW Century Flight Systems, Inc. F.M. 1195 P. 0. Box 61.0 , Mineral Wells, TX 76067 -nas. 1A15 and A1EA Piper PA-24-250, PA-24-260, and PA-30 Installation of Mitchell Automatic Flight System Model AK186 consisting of Piper Altimatic IIIB Autopilot, Radio Coupler, and Automatic Aileron Stabilizer Model AK179 according to Bulletin No. 302, revised 12-18-69 and Mitchell Pitch Trim System Model AK189 according to Mitchell Bulletin No. 303 dated 12-7-65. Installation of Mitchell Radio Coupler Model 1C388-3 , according to Bulletin No. 611 Revision (1) dated 4-16-74 and Master Drawing List No. 87A708 Revision A dated 4-16-74. The following FAA Approved Airplane Flight Manual Supplements are required; 1. Dated 6-24-66 for AK186 installation. 2. Dated 6-24-66 for AK179 installation, 3. P/N 68S167 dated 4-16-74 for Mitchell Radio Coupler Model 1C388-3. Eligible on Piper PA-24-250, S/N 24-1, 24-103 and Up; PA-24-260, S/N 24-3642, 24-4000 - 24-4246; 24-4248 - 24-4299, 24-4247 and 24-4300 and Up; PA-30 S/N 30-1 and Up. * JSab|bSS?m?JeSh4; 'E^SajSrT1** °ther Previously approved modifications ^n*fr^4*^if*4zafa'eM&'^tfa'At«»/ 7-25-66; 10-20-66; 7-22-70; 4-16-74; 6-25-84, Revision 5 December 13, 1965 L/«6 a,, Don P. Watson Manager, Aircraft Certification Division Southwest Region (Title) This certificate may be transferred in accordance with f'AK 21.17. f AA FMM • 110-2 (10-4«) 1 INSTRUCTIONS: The tranrferendowment below may be u,ed to notify the appropriate FAA Regional Office of the transfer of thii Supplemental Type Certificate. The FAA will reiuue the certificate in the name of the transferee and forward it 10 him. TRANSFER ENDORSEMENT Transfer the ownership of Supplemental Type Certificate Number to (Name of'transferee). (Address of transferee) —— ( ,V«m*