# STC SA2573WE - Type: Supplemental type certificate - Status: Current, Reissued - Holder: United Airlines Inc, United States - Description: Installation of interior modifications. - Applied: May 15, 1972 - 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/e7/c4/e7c46c7738ca7aa72d98c114254ced2a2b8ae3bd1f42d358a00ba232f5f5ff91 - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/6FF6B1D1EE5C181B86257999006E22D8.0001 - DRS record last changed: December 5, 2025 - Page: https://openairdocs.org/stc/SA2573WE ## ADs that name it (0) None. ## Approved models (5) - McDonnell Douglas Corporation DC-8-21 ([TCDS 4A25](https://openairdocs.org/tcds/4A25)) - McDonnell Douglas Corporation DC-8-31 ([TCDS 4A25](https://openairdocs.org/tcds/4A25)) - McDonnell Douglas Corporation DC-8-33 ([TCDS 4A25](https://openairdocs.org/tcds/4A25)) - McDonnell Douglas Corporation DC-8-51 ([TCDS 4A25](https://openairdocs.org/tcds/4A25)) - McDonnell Douglas Corporation DC-8-52 ([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. This Certificate issued to United Air Lines, Inc. 600 Jefferson Street Houston, Texas 77002 Part 4b of t he Civil Air Regulations, (See T. C. Data Sheet). 4A25 Boeing DC-8-21, -31, -33, -51, -52 Description of Type Design Change: Installation of interior modifications in accordance with FAA Approved United Air Lines Drawing List No. C0A 2-4371-001, -002, -003 and -004. Limitations and Conditions: This approval should not be exte nded to other specific airplanes of this model on which other previously approved modifications are incorporated, unless it is determined that the interrelationship between th is change and any of those other previously approved modifications will introduce no adverse eff ect upon the airworthiness of that airplane. If the holder agrees to permit another person to use th is 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: May 15, 1972 Date of issuance: July 21, 1972 Date reissued: November 30, 2011 Date amended: March 6, 1974 ( Signature) Haifa Haj-Eid Supervisor, Technical & Administrative Support Staff, Los Angeles Aircraft Certification Office ( Title) ## Every issue (1) - November 30, 2011: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/e7/c4/e7c46c7738ca7aa72d98c114254ced2a2b8ae3bd1f42d358a00ba232f5f5ff91) --- 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.