# STC ST04450AT - Type: Supplemental type certificate - Status: Current, Reissued - Holder: Avionics Support Group Inc., United States - Description: Installation of the dual Rockwell Collins TPR-901, ADS-B out capable trasnponder system and dual GPS-4000S position sensor - Applied: July 3, 2018 - Status date: May 18, 2021 - Product: Aircraft, Large Airplane - Certification basis: Part 21, Part 25, Part 26 - Data sheets: [TCDS A6WE](https://openairdocs.org/tcds/A6WE) - Certificate PDF: https://openairdocs.org/files/sha256/ab/8e/ab8e470a6e8ac005ce3370b703803b0d13a7cf22e47f3545c69de59726b17e49 - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/2FE718E552AEE85A862586DA006A8684.0001 - DRS record last changed: December 6, 2025 - Page: https://openairdocs.org/stc/ST04450AT ## ADs that name it (0) None. ## Approved models (16) - The Boeing Company DC-9-11 ([TCDS A6WE](https://openairdocs.org/tcds/A6WE)) - The Boeing Company DC-9-12 ([TCDS A6WE](https://openairdocs.org/tcds/A6WE)) - The Boeing Company DC-9-13 ([TCDS A6WE](https://openairdocs.org/tcds/A6WE)) - The Boeing Company DC-9-15 ([TCDS A6WE](https://openairdocs.org/tcds/A6WE)) - The Boeing Company DC-9-15F ([TCDS A6WE](https://openairdocs.org/tcds/A6WE)) - The Boeing Company DC-9-31 ([TCDS A6WE](https://openairdocs.org/tcds/A6WE)) - The Boeing Company DC-9-32 ([TCDS A6WE](https://openairdocs.org/tcds/A6WE)) - The Boeing Company DC-9-32F ([TCDS A6WE](https://openairdocs.org/tcds/A6WE)) - The Boeing Company DC-9-33F ([TCDS A6WE](https://openairdocs.org/tcds/A6WE)) - The Boeing Company DC-9-34 ([TCDS A6WE](https://openairdocs.org/tcds/A6WE)) - The Boeing Company DC-9-34F ([TCDS A6WE](https://openairdocs.org/tcds/A6WE)) - The Boeing Company DC-9-81 (MD-81) ([TCDS A6WE](https://openairdocs.org/tcds/A6WE)) - The Boeing Company DC-9-82 (MD-82) ([TCDS A6WE](https://openairdocs.org/tcds/A6WE)) - The Boeing Company DC-9-83 (MD-83) ([TCDS A6WE](https://openairdocs.org/tcds/A6WE)) - The Boeing Company DC-9-87 (MD-87) ([TCDS A6WE](https://openairdocs.org/tcds/A6WE)) - The Boeing Company MD-88 ([TCDS A6WE](https://openairdocs.org/tcds/A6WE)) ## 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 (11/20) SUPERSEDES PREVIOUS EDITION Page 1 of ___ United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate Number: ST04450AT Avionics Support Group, Inc. 13155 SW 132 Avenue Miami, FL 33186 Part 25 the Federal Aviation Regulations A6WE The Boeing Company DC-9-11, DC-9-12, DC-9-13, DC-9-15, DC-9-15F, DC-9-31, DC-9-32, DC-9-32F, DC-9-33F, DC-9-34, DC-9-34F, DC-9-81 (MD-81), DC-9-82 (MD-82), DC-9-83 (MD-83), DC-9-87 (MD-87), MD-88 Installation of the dual Rockwell Collins TPR-901, ADS-B out capable trasnponder system and dual GPS-4000S position sensor per Master Drawing List, 218230-MDL, Revision E, dated March 19 2020 or later FAA approved revision. (See Continuation Sheet 3 of 4) July 3, 2018 May 18, 2021 May 21, 2019 (for)Christina Underwood, Manager Atlanta Aircraft Certification Office 4 FAA Form 8110-2 (11/20) SUPERSEDES PREVIOUS EDITION Page 2 of ___ United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate Number: ST04450AT FAA Form 8110-2 (11/20) SUPERSEDES PREVIOUS EDITION Page ___ of ___ United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate (Continuation Sheet) Number: ST04450AT Limitations and Conditions - cont.: 1. The installer must determine whether this design change is compatible with previously approved modifications. 2. If the 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. 3. Instructions for Continued Airworthiness (ICA) document 218230-ICA, Rev B, dated March 23, 2020 or later FAA accepted revision and Airplane Flight Manual Supplement (AFMS) document 218230-FMS, Rev IR, dated May 7, 2019 or later FAA approved revision must be made available to the operator at the time of installation. FAA Form 8110-2 (11/20) SUPERSEDES PREVIOUS EDITION Page ___ of ___ United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate (Continuation Sheet) Number: ST04450AT Certification Basis: Based on 14 CFR 21.115 and 21.101, and the FAA policy for significant changes in FAA Order 8110.48, the certification basis for the Boeing DC-9/MD-83 series aircraft is as follows: a. The type certification basis for Boeing DC-9 and MD-83 airplane is shown on TCDS A6WE for parts not changed or not affected by the change. b. The certification basis for parts changed or affected by the change since the reference date of application, July 31, 2018, is based upon part 25 as amended by Amendment 25-145. Based on 14 CFR 21.115 and 21.101, and the FAA policy for significant changes in FAA Order 8110.48, the certification basis for this modification was determined to be: Regulations at the latest amendment 25-0 through 25-145 § 25.29 § 25.301 § 25.303 § 25.305 § 25.307 § 25.561 § 25.571 § 25.581 § 25.601 § 25.603 § 25.605 § 25.609 § 25.611 § 25.613 § 25.771 § 25.773 § 25.777 § 25.1301 § 25.1307 § 25.1309 § 25.1322 § 25.1351 § 25.1353 § 25.1357 § 25.1360 § 25.1431 § 25.1529 § 25.1541 § 25.1581 Regulations at an intermediate amendment None Regulations at the amendment level in TCDS A6WE None 14 CFR Part 26 Regulations Based on 14 CFR 21.101(g), applicable provision of 14 CFR part 26 are included in the certification basis. For any future 14 CFR part 26 amendments, the holder of this STC must demonstrate compliance with the applicable sections. As of the issuance date of this STC, compliance has been found for the following regulation: **14 CFR 26.11** --------------------------END--------------------------- 4 4 ## Every issue (1) - May 18, 2021: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/ab/8e/ab8e470a6e8ac005ce3370b703803b0d13a7cf22e47f3545c69de59726b17e49) --- 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.