# STC SA2201WE - Type: Supplemental type certificate - Status: Current, Reissued - Holder: United Airlines Inc, United States - Description: Installation of Bendix Third Attitude Indicator to meet the requirements of 14 CFR 121.305(j) - Applied: April 10, 1970 - Status date: November 30, 2011 - Product: Aircraft, Large Multi-Engine - Certification basis: Part 21, Part 121 - Data sheets: [TCDS A3WE](https://openairdocs.org/tcds/A3WE) - Certificate PDF: https://openairdocs.org/files/sha256/b2/52/b2520bb9df80acdf6f672a548ec23b7edbcca05925afa8604942cd524cc8c302 - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/638B904A63C918378625799700573BC1.0001 - DRS record last changed: December 6, 2025 - Page: https://openairdocs.org/stc/SA2201WE ## ADs that name it (0) None. ## Approved models (3) - The Boeing Company 727 Series ([TCDS A3WE](https://openairdocs.org/tcds/A3WE)) - The Boeing Company 727-200 Series ([TCDS A3WE](https://openairdocs.org/tcds/A3WE)) - 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. dated December 31, 1953 (See T.C. Data Sheet A3WE). A3WE Boeing 727-022, 727-022C , 727-222 Description of Type Design Change : Installation of Bendix Third Attitude Indicator to meet the requirements of 14 CFR 121.305(j) in accordance with FAA Approved United Air Lines Engineering and Maintenance Report F-1455 Appendix “A”, or FAA approved revision. Limitations and Conditions: This approval should not extended to ot her aircraft of this model on which other previously approved modifications are incorporat ed unless it is determined by the installer that the interrelationship between this cha nge and any of those other previ ously 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 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: April 10, 1970 Date of issuance: July 10, 1970 Date reissued: November 30, 2011 Date amended: November 25, 1975 ( 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/b2/52/b2520bb9df80acdf6f672a548ec23b7edbcca05925afa8604942cd524cc8c302) --- 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.