# STC SA5633NM-D - Type: Supplemental type certificate - Status: Current, Reissued - Holder: United Airlines Inc, United States - Description: Extend Business Class into D-zone section, changing seat count from 36F-98C-244Y to 36F-126C-184Y. Remove (60) Coach Class Seats, install (28) Business Class Seats. Install (2) outboard and (1) centerline class divider partitions. Install (1) centerline video projector and screen. Install (2) outboard class divider mounted video monitors. Replace single flight attendant seat at door 2R with a double flight attendant seat. - Applied: January 24, 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/sha256/30/da/30dae14fcd99a2289101ab8dc79d570222092d0c9484398edf2006e12656e849 - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/96AD93162A53F36C862579970055F150.0001 - DRS record last changed: December 6, 2025 - Page: https://openairdocs.org/stc/SA5633NM-D ## ADs that name it (0) None. ## Approved models (1) - The Boeing Company 747-400 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. Ref. Type Certificate Data Sheet A20WE for Special Conditions. A20WE Boeing B747-400 Series Description of Type Design Change: Extend Business Class into D-zone section, changing seat count from 36F-98C-244Y to 36F-126C-184Y. Rem ove (60) Coach Class Seats, install (28) Business Class Seats. Install (2) outboard and (1 ) centerline class divider partitions. Install (1) centerline video projector and screen. Install (2) outboard class divider mounted video monitors. Replace single flight attendant seat at door 2R with a double flight attendant seat. This modification was accomplished in accordance with United Air Lines, DAS-1-WE, Approved Master Drawing List No. 5633 dated April 13, 1992, or later approved revisions. Limitations and Conditions: This approval does not extend to other 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 other previously approved modifications will introduce no adverse e ffect upon the airworthiness of that aircraft. This determination should include considerations of significant changes in weight distribution such as an increase in the fixed disposable weight in the fuselage. If the holder agrees to permit another person to use this certificate to alter th e 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: January 24, 1992 Date of issuance: April 13, 1992 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/sha256/30/da/30dae14fcd99a2289101ab8dc79d570222092d0c9484398edf2006e12656e849) --- 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.