# STC SA3590WE-D - Type: Supplemental type certificate - Status: Current, Reissued - Holder: United Airlines Inc, United States - Description: The cabin interior seating configuration will change from 10F/124Y to 14F/118Y. One row of coach seats will be removed and one row of first class seats will be added. The class divider will be moved accordingly. - Applied: December 8, 1978 - 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/sha256/59/e1/59e149949a7f29d1a4fe45e687719ef33d66e9c43bc6b82450f084ff53c1c251 - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/1A2DE3B228B49B308625799800581CA9.0001 - DRS record last changed: December 6, 2025 - Page: https://openairdocs.org/stc/SA3590WE-D ## ADs that name it (0) None. ## Approved models (1) - The Boeing Company 727-200 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 T.C. Data Sheet A3WE for Special Conditions. A3WE Boeing 727-222 Description of Type Design Change : The cabin interior seating confi guration will change from 10F/124Y to 14F/118Y. One row of coach seats will be removed and one row of first class seats will be added. The class divider will be moved accordingly. All of th is will be accomplished in accordance with United Air Lines, DAS-1-WE, Approved Drawing List No. 3590 dated February 9, 1979, or later FAA approved revisions. Limitations and Conditions: This approval should not be extended to other specific airplanes of this model on which other previously appr oved modifications are incorporated unless it is determined 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 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. 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 8, 1978 Date of issuance: February 9, 1979 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/sha256/59/e1/59e149949a7f29d1a4fe45e687719ef33d66e9c43bc6b82450f084ff53c1c251) --- 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.