# STC SA00940DE - Type: Supplemental type certificate - Status: Current, Reissued - Holder: West Star Aviation LLC, USA - Description: Activation of previously approved Static Source Error Correction (SSEC) software used with the Garmin GSU 75B ADAHRS - Applied: December 5, 2018 - Status date: April 11, 2023 - Product: Aircraft, Small Airplane - Certification basis: Part 23 - Data sheets: [TCDS A28CE](https://openairdocs.org/tcds/A28CE) - Certificate PDF: https://openairdocs.org/files/sha256/ed/d7/edd725a6f5d139935e777df6fa795a8e283495de4f730f4c10c70aefb00b3391 - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID173775826120230922210849.0001 - DRS record last changed: December 5, 2025 - Page: https://openairdocs.org/stc/SA00940DE ## ADs that name it (0) None. ## Approved models (1) - Textron Aviation Inc. 441 ([TCDS A28CE](https://openairdocs.org/tcds/A28CE)) ## 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 3 Part 23 of the Federal Aviation Regulations. (Ref. Sheet 3 for complete certification basis) Original Product – Type Certificate Number: A28CE Make: Cessna Models: 441 Description of Type Design Change: Activation of previously approved Static Source Error Correction (SSEC) software used with the Garmin GSU 75B ADAHRS in accordance with West Star Aviation Master Data List, 18328L-1433, Rev E, Dated May/26/2021, or later FAA approved revision. The modified aircraft must be maintained in accordance with Instructions for Continued Airworthiness, West Star Aviation Doc. No. 19328M-901, Revision B, Dated Apr/02/2021, or later FAA accepted revision. 1. This Supplemental Type Certificate does not approve the installation of required equipment for Reduced Vertical Separation Minimum (RVSM). The following must be previously installed on eligible aircraft: a. STC SA02571SE, including dual Garmin G600 TXi systems using GDU 1060 system displays and Dual Garmin GSU 75B ADAHRS. b. STC SA09622AC, for S-Tec Magic 2100 DFCS using computer P/N 01304-01-01-003, or STC SA09546AC-D, for S-Tec Magic 2100 DFCS using computer P/N 01304-07-01-011, or STC SA01844WI, for Garmin GFC 600 AFCS using mode controller P/N 011-02967-02. 2. A copy of this certificate must be maintained as part of the permanent records for the modified aircraft. (Limitations and Conditions continues on page 3) Date of Application: December 05, 2018 Date Reissued: April 11, 2023 Date of Issuance: June 06, 2019 Date Amended: December 10, 2020, May 26, 2021 By Direction of the Administrator Signature Title: Jeffrey S. Maszkiewicz ODA Administrator West Star Aviation, LLC. ODA-834270-NM SA00940DE West Star Aviation, LLC. 796 Heritage Way Grand Junction, CO 81506 FAA Form 8110-2 (5/14) Page 2 of 3 United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate (Continuation Sheet) Number: SA00940DE Date of Issuance: June 06, 2019 Date Amended: December 10, 2020, May 26, 2021 Date Reissuance: April 11, 2023 To (Name and address of transferee) From (Name and address of grantor) FAA Form 8110-2 (5/14) Page 3 of 3 United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate (Continuation Sheet) Number: SA00940DE Date of Issuance: June 06, 2019 Date Amended: December 10, 2020, May 26, 2021 Date Reissuance: April 11, 2023 Limitations and Conditions: (Continued) 3. If the STC holder agrees to permit another person to use this certificate to alter the product, the holder shall give the other person written evidence of that permission. 4. The installer must determine if this design change is compatible with previously approved modifications. Certification Basis: Based on 14 CFR §§ 21.115 and 21.101, and FAA policy for significant changes in FAA Order 8110.48, the certification basis for the Textron Aviation Inc., model 441 aircraft with activated SSEC software used with Garmin GSU 75B ADAHRS is as follows: 1. The type certification basis for the Textron Aviation Inc., Model 441 aircraft is shown on TCDS A28CE for parts not changed or not affected by this change. 2. The certification basis for parts changed or affected by this change since the reference date of application, March 26, 2020, is based on 14 CFR §§ 23 as shown on TCDS A28CE. Regulations at latest amendment 23-0 through 23-62 23.1301(a)(b)(c) of amendment 23-62, 23.1529 of amendment 23-26 END ## Every issue (2) - April 11, 2023: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/ed/d7/edd725a6f5d139935e777df6fa795a8e283495de4f730f4c10c70aefb00b3391) - June 6, 2019: Issued, Current. [certificate](https://openairdocs.org/files/sha256/b5/5c/b55cafd9c5c1654d9be1dfff73a08a53b6d079f9cc1ea64b796fa5085b7d955b) --- 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.