# STC SA5648NM-D - Type: Supplemental type certificate - Status: Current, Reissued - Holder: United Airlines Inc, United States - Description: Installation and activation of a Collins radio TCAS II system, dual Smith Industries TCAS Type Vertical Speed Indicator, dual Mode S transponder system, and a dual Collins Radio WXR700C weather radar system. (747-021 (SP) SERIES) - Applied: December 1, 1992 - 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/dc/41/dc41887cd8594e84d2fad140493f79fe2b6127be2a13f7a319db232ab0b53087 - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/DD80097B6E2F4BEE8625799700582585.0001 - DRS record last changed: December 6, 2025 - Page: https://openairdocs.org/stc/SA5648NM-D ## ADs that name it (0) None. ## Approved models (1) - The Boeing Company 747 ([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 R lOriginal Product Type Certificate Number : A20WE Boeing 747-021 (SP) series Description of Type Design Change: Installation and activation of a Collins Radio TCAS II system, dual Smith Industries TCAS Type Ver tical Speed Indicator, dual Mode S Transponder System, and a dual Collins Radio WXR 700C Weather Radar System, in accordance with United Air Lines DAS-1-WE Approved Drawing List No. 5648 dated January 20, 1993, or later FAA approved revisions. United Air Lines AFM Supplement to FAA Approved Flight Manual No. D6 137303.122, dated January 20, 1993, or later FAA appr oved revisions is required part of the modification. Limitations and Conditions: This approval should not 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 th is change and any of those other previously approved modifications will introduce no adverse e ffect upon the airworthiness of that 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: December 1, 1992 Date of issuance: January 20, 1993 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/dc/41/dc41887cd8594e84d2fad140493f79fe2b6127be2a13f7a319db232ab0b53087) --- 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.