# STC SA3359WE-D - Type: Supplemental type certificate - Status: Current, Issued - Holder: United Airlines Inc, United States - Description: Retrofit of Kollsman P/N A41869-10-021 altimeters on the captain's and first officer's instrument panel. (727-22C) - Applied: December 30, 1977 - Status date: November 30, 2011 - Product: Aircraft, Large Multi-Engine - Certification basis: Part 21 - Data sheets: [TCDS A3WE](https://openairdocs.org/tcds/A3WE) - Certificate PDF: https://openairdocs.org/files/sha256/87/a9/87a97dabe943440a3519a5447cbc8a6adb94ad1bab0de2f9debb36cce61a5d05 - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/033854EF0E2B855D862579CE00578F75.0001 - DRS record last changed: December 6, 2025 - Page: https://openairdocs.org/stc/SA3359WE-D ## ADs that name it (0) None. ## Approved models (1) - The Boeing Company 727C Series ([TCDS A3WE](https://openairdocs.org/tcds/A3WE)) ## 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 4b of the Civil Air Regulations. *See Type Certificate Data Sheet A3WE. A3WE Boeing 727-22C Description of Type Design Change: Retrofit of Kollsman Part No. A41869-10-021 altimeters on the Captain’s and First Officer’s instrument panel in accordance with United Air Lines, DAS-1WE, Approved Drawing List 3359 dated January 10, 1978, or later FAA approved revision. Limitations and Conditions: This approval does not extend 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 of those other previously approved modifications will introduce no adverse effect upon the airworthiness of that aircraft. If the holder agrees to permit another person to use this certificate 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 30, 1977 Date of issuance: January 11, 1978 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: Issued, Current. [certificate](https://openairdocs.org/files/sha256/87/a9/87a97dabe943440a3519a5447cbc8a6adb94ad1bab0de2f9debb36cce61a5d05) --- 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.