# STC SA09906AC - Type: Supplemental type certificate - Status: Current, Issued - Holder: Direct-To Aviation Services Inc, United States - Description: Reduce maximum number of seats to 5 passenger seats with a total occupancy maximum of 6 occupants - Applied: June 21, 2019 - Status date: December 13, 2019 - Product: Aircraft, Small Airplane - Certification basis: Part 21 - Data sheets: [TCDS 6A1](https://openairdocs.org/tcds/6A1) - Certificate PDF: https://openairdocs.org/files/sha256/1f/a9/1fa93e564fb98d951efa4e796fadbbda74807acae539b834da9cbdd99f3c8657 - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/1CCD3D20B91574B0862585A4004B76A6.0001 - DRS record last changed: December 5, 2025 - Page: https://openairdocs.org/stc/SA09906AC ## ADs that name it (0) None. ## Approved models (1) - Twin Commander Aircraft LLC 500-A ([TCDS 6A1](https://openairdocs.org/tcds/6A1)) ## 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. United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate The STC’s supporting documentation (drawings, instructions, specifications, flight manual supplements, etc.) is the property oft h eS T C holder. FAA Form 8110-2 (7/19) Page 1 of This certificate issued to: Part of the Original Product – Type Certificate Number: Make: By Direction of the Administrator Signature Title 2 SA09906AC Direct-To Aviation Services, Inc 11409 Gloriosa Dr Keller, TX 76244 Civil Air Regulations3 Description of Type Design Change: Reduce maximum number of seats to 5 passenger seats with a total occupancy maximum of 6 occupants in accordance with Work Instructions DTAS190510WI Rev B, dated November 22, 2019 or later FAA approved revision. Airplane Flight Manual Supplement DTAS190510FM, Revision IR, dated December 10, 2019, or later FAA approved revision is required. You cannot use descriptive data about this design to duplicate other products. This approval is limited to only the installation made in Twin Commander Aircraft Model 560A, Serial Number 312. This Supplemental Type Certificate does not permit manufacturing of parts for multiple installations. The installer must determine whether this design change is compatible with previously approved modifications. 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. Jim Grigg Manager, Fort Worth ACO Branch Compliance & Airworthiness Division Aircraft Certification Service Twin Commander Aircraft LLC 560A June 21, 2019 December 13, 2019 6A1 United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate The STC’s supporting documentation (drawings, instructions, specifications, flight manual supplements, etc.) is the property oft h eS T C holder. FAA Form 8110-2 (7/19) Page 2 of To (Name and address of transferee) From (Name and address of grantor) Extent of Authority (if licensing agreement): 2 SA09906AC ## Every issue (1) - December 13, 2019: Issued, Current. [certificate](https://openairdocs.org/files/sha256/1f/a9/1fa93e564fb98d951efa4e796fadbbda74807acae539b834da9cbdd99f3c8657) --- OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.