# STC SA2761NM-D - Type: Supplemental type certificate - Status: Current, Reissued - Holder: United Airlines Inc, United States - Description: Modifies the aircraft to install Walter-Kidde engine fire detector assemblies with stud-type terminal connections. The installation is in accordance with DAS-1-WE Approved United Air Lines Drawing List No. 2761, dated September 6, 1989, or later FAA approved revisions. - Applied: May 17, 1989 - Status date: November 30, 2011 - Product: Aircraft, Large Multi-Engine - Certification basis: Part 21, Part 25 - Data sheets: [TCDS A20WE](https://openairdocs.org/tcds/A20WE) - Certificate PDF: https://openairdocs.org/files/sha256/7f/ff/7ffffc6af03c50d89480a2d33ffab8286aad6fb2d9285b0a28ec2dd4e1aaa25b - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/4D556605EA1DF42A8625799600548C2C.0001 - DRS record last changed: December 6, 2025 - Page: https://openairdocs.org/stc/SA2761NM-D ## ADs that name it (0) None. ## Approved models (2) - The Boeing Company 747-100 Series ([TCDS A20WE](https://openairdocs.org/tcds/A20WE)) - The Boeing Company 747SP Series ([TCDS A20WE](https://openairdocs.org/tcds/A20WE)) ## 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. This Certificate issued to United Air Lines, Inc. 600 Jefferson Street Houston, Texas 77002 Part 25 of the Federal Aviation Regulations Reference Type Certificate Data Sheet A20WE for Special Conditions. A20WE Boeing/Pratt & Whitney 747-100/SP Series Aircraft with JT9D-3A/-7A Series Engines Description of Type Design Change: Modifies the aircraft to install Walter-Kidde engine fire detector assemblies with stud-type terminal connections. The installation is in accordance with DAS-1-WE Approved United Air Lines Drawing List No. 2761, dated September 6, 1989, or later FAA approved revisions. Limitations and Conditions: The approval of this installation applies basically to the 747-100/SP Series only. This approval should not be extende d to other specific aircraft of this model on which other previously approved modifications ar e incorporated unless it is determined by the installer that the interrelationship between this change and any of those previously approved modifications will introduce no adverse effect upon th e airworthiness of this aircraft. 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. This certificate and the supporting data, which is the basis for approval, shall remain in effect until surrendered, suspended, revoked or a termination date is otherwise established by the Administrator of the Federal Aviation Administration. Date of application: May 17, 1989 Date of issuance: September 8, 1989 Date reissued: November 30, 2011 ( Signature) Haifa Haj-Eid Supervisor, Technical & Administrative Support Staff, Los Angeles Aircraft Certification Office ( Title) NOTE: **DO NOT DELETE THIS PAGE.** **DO NOT ADD ANY DATA TO THIS PAGE.** **THIS PAGE IS FOR PAGE NUMBERING PURPOSES, PLEASE DISCARD PRINTED COPY.** ## Every issue (1) - November 30, 2011: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/7f/ff/7ffffc6af03c50d89480a2d33ffab8286aad6fb2d9285b0a28ec2dd4e1aaa25b) --- 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.