# STC ST00375AT - Type: Supplemental type certificate - Status: Current, Reissued - Holder: Honeywell International Inc, United States - Description: Installation of a CAS-81 TCAS II and a TRA-67 Mode S transponder. - Applied: September 9, 1993 - Status date: December 21, 2021 - Product: Aircraft, Large Airplane - Certification basis: Part 21, Part 21, Part 21, Part 21, Part 21, Part 21, Part 21 - Data sheets: [TCDS 4A25](https://openairdocs.org/tcds/4A25) - Certificate PDF: https://openairdocs.org/files/sha256/6c/08/6c086ec80bf293189f5c296f89f42a5922bd1009a6e349feca30adb8ad37a9cc - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID150720105020221206152504.0001 - DRS record last changed: December 6, 2025 - Page: https://openairdocs.org/stc/ST00375AT ## ADs that name it (0) None. ## Approved models (6) - The Boeing Company DC-8-71 ([TCDS 4A25](https://openairdocs.org/tcds/4A25)) - The Boeing Company DC-8-71F ([TCDS 4A25](https://openairdocs.org/tcds/4A25)) - The Boeing Company DC-8-72 ([TCDS 4A25](https://openairdocs.org/tcds/4A25)) - The Boeing Company DC-8-72F ([TCDS 4A25](https://openairdocs.org/tcds/4A25)) - The Boeing Company DC-8-73 ([TCDS 4A25](https://openairdocs.org/tcds/4A25)) - The Boeing Company DC-8-73F ([TCDS 4A25](https://openairdocs.org/tcds/4A25)) ## 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: ST00375AT Honeywell International Inc. 21111 N 19th Ave Phoenix, Arizona 85027 Part 4b the Civil Air Regulations 4A25 Boeing DC-8-70 Installation of a CAS-81 TCAS II and a TRA-67 Mode S transponder in accordance with Master Drawing List No. 699-50049, Revision E, dated October 8, 1999, or later FAA approved revision; or a CAS-81 TCAS Il and dual TRA-67 Mode S transponders in accordance with Master Drawing List No. 159-08220-0001, Revision C, dated December 8, 1999, or later FAA approved revision. FAA approved Airplane Flight Manual Supplement No. 699-69519, Revision A, dated October 19, 1999, or later FAA approved revision, is a required part of this STC. This approval should not be extended to other aircraft of this model on which other previously approved modifications are incorporated, unless it is determined by the installer that the interrelationship between this change and any other previously approved modifications will produce no adverse effect upon the airworthiness of that airplane. 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. September 9, 1993 July 27, 2000; December 21, 2021 November 12, 1993 August 3, 1999 For Acting Manager, Seattle ACO Branch 2 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: ST00375AT 2 ## Every issue (4) - December 21, 2021: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/6c/08/6c086ec80bf293189f5c296f89f42a5922bd1009a6e349feca30adb8ad37a9cc) - December 21, 2021: Reissued, Historical. [certificate](https://openairdocs.org/files/sha256/76/60/766089d3e7981ffd476d7e530a2fec81009af11f69dddcd8334533d0941e7360) - December 21, 2021: Reissued, Historical. [certificate](https://openairdocs.org/files/sha256/6c/08/6c086ec80bf293189f5c296f89f42a5922bd1009a6e349feca30adb8ad37a9cc) - July 27, 2000: Reissued, Historical. [certificate](https://openairdocs.org/files/sha256/1e/49/1e494aa25f6b8b7f444d24c38a0e12de2675d3078449dfd5471261300d5d86ce) --- 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.