# STC SA2121WE - Type: Supplemental type certificate - Status: Current, Reissued - Holder: Sierra Industries Ltd., United States - Description: Installation of recontoured wing leading edge, drooped ailerons in flaps down mode, stall fences, and elevator trim spring. - Applied: July 23, 1969 - Status date: July 31, 2017 - Product: Aircraft, Small Airplane - Certification basis: Part 21, Part 23 - Data sheets: [TCDS A16CE](https://openairdocs.org/tcds/A16CE) - Certificate PDF: https://openairdocs.org/files/sha256/f8/7d/f87dc7b083ce1080c47829fa792a57f87bc5644f241d25ee47364cbd0dbcb3b6 - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/44FBA208F611F7308625871F004BAF5B.0001 - DRS record last changed: December 6, 2025 - Page: https://openairdocs.org/stc/SA2121WE ## ADs that name it (0) None. ## Approved models (4) - Textron Aviation Inc. 207 ([TCDS A16CE](https://openairdocs.org/tcds/A16CE)) - Textron Aviation Inc. 207A ([TCDS A16CE](https://openairdocs.org/tcds/A16CE)) - Textron Aviation Inc. T207 ([TCDS A16CE](https://openairdocs.org/tcds/A16CE)) - Textron Aviation Inc. T207A ([TCDS A16CE](https://openairdocs.org/tcds/A16CE)) ## 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. FAA Form 8110-2 (5/14) Page 1 of 2 Reissued on July 31, 2017 to supersede the original STC, which has been lost or misplaced. Number: SA2121WE Part 23 of the Federal Aviation Regulations. Original Product – Type Certificate Number: A16CE Make: Cessna Model: 207, T207, 207A, and T207A Installation of recontoured wing leading edge, drooped ailerons in flaps down mode, stall fences and elevator trim spring in accordance with the drawings called for on FAA sealed Robertson Aircraft Drawing List No. 13. The approval of this change in type design applies basically to the above model aircraft only. This approval should not be extended to other aircraft of this model on which other previously approved modifications are incorporated unless it is determined that the interrelationship between this change and any other type design changes or previously approved modifications will introduce no adverse effect upon the airworthiness of that aircraft. A copy of this Certificate shall be maintained as part of the permanent record for the modified aircraft. Date of Application: July 23, 1969 Date Reissued: 11/5/73; 11/8/84; 10/10/86; 7/21/05; 7/31/17 Date of Issuance: March 12, 1970 Date Amended: 3/18/71; 2/2/78 Signature Title Jim Grigg Manager, Fort Worth A CO Branch, Compliance & Airworthiness Division Sierra Industries, Ltd. 122 Howard Langford Drive Uvalde, TX 78801 FAA Form 8110-2 (5/14) Page 2 of 2 Transfer the ownership of Supplemental Type Certificate Number: SA2121WE To (Name and address of transferee) From (Name and address of grantor) United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate (Continuation Sheet) Number: SA18NW FAA Form 8110-2 (5/14) Page 3 of 3 ## Every issue (2) - July 31, 2017: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/f8/7d/f87dc7b083ce1080c47829fa792a57f87bc5644f241d25ee47364cbd0dbcb3b6) - July 21, 2005: Reissued, Historical. [certificate](https://openairdocs.org/files/sha256/81/9f/819f41816db75ab1376bf9829cb0b5ccd4b11aa03c3b4c0e1190e5a8f2fda4d2) --- 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.