# STC SA3584WE-D - Type: Supplemental type certificate - Status: Current, Reissued - Holder: United Airlines Inc, United States - Description: Seat mix change from 162 passenger all coach configuration to18F/129Y-147 passenger configuration. - Applied: September 14, 1978 - Status date: November 30, 2011 - Product: Aircraft, Large Multi-Engine - Certification basis: Part 21 - Data sheets: [TCDS 4A25](https://openairdocs.org/tcds/4A25) - Certificate PDF: https://openairdocs.org/files/sha256/fd/d8/fdd8e118196cf01d9595305e6dec6bead5b9661852ed572406cbae6cb453277e - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/6623C941DFD7C2D5862579980053E95E.0001 - DRS record last changed: December 5, 2025 - Page: https://openairdocs.org/stc/SA3584WE-D ## ADs that name it (0) None. ## Approved models (1) - The Boeing Company DC-8-62 ([TCDS 4A25](https://openairdocs.org/tcds/4A25)) ## 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. 600 Jefferson Street Houston, Texas 77002 Part 4b of the Civil Air Regulations. 4A25 Boeing DC-8-62 Description of Type Design Change: Seat mix change from 162 passenger all coach configuration to 18F/129Y - 147 passenger configuration. Installation in accordance with DAS-1-WE United Air Lines Drawing List No. 3584 dated October 3, 1978, or later approved revisions. Limitations and Conditions: The approval of this change in type design applies basically to DC-8- 62. This approval should not be extended to ot her aircraft of this model on which other previously approved modifications are incor porated unless it is determined 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. This determination should include consideration 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 the product, the holder sh all 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: September 14, 1978 Date of issuance: October 3, 1978 Date reissued: November 30, 2011 Date amended: November 1, 1978 ( 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/fd/d8/fdd8e118196cf01d9595305e6dec6bead5b9661852ed572406cbae6cb453277e) --- 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.