# STC SA3586WE-D - Type: Supplemental type certificate - Status: Current, Reissued - Holder: United Airlines Inc, United States - Description: Installation of a removable dual Delco C-IV inertial navigation system for navigation only. - Applied: August 21, 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/sha256/4e/73/4e73de423a9402dd9d557a590eacfe79502b669715c3e5dc359b5a7c9fc0edd0 - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/E540C8D29E93C05E862579980054160D.0001 - DRS record last changed: December 6, 2025 - Page: https://openairdocs.org/stc/SA3586WE-D ## ADs that name it (0) None. ## Approved models (1) - The Boeing Company DC-8F-54 ([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 the Civil Air Regulations. See Type Certificate Data Sheet 4A25. 4A25 Boeing DC-8F-54 Description of Type Design Change: Installation of a removable dual Delco C-IV Inertial Navigation System (INS) for navigation only, in accordance with United Air Lines, DAS-1-WE Approved Drawing List No. 3586 dated October 26, 1978 or later FAA approved revisions. United Air Lines FAA Approved Flight Manual Supplement on removable Delco C-IV INS dated Octobe r 15, 1978 for McDonnell Douglas DC-8F-54 Airplane Flight Manual LB31180 is required as part of this installation. Limitations and Conditions: The approval of this change in type design applies basically to model DC-8F- 54 only. This approval does not extend to other ai rcraft of this model on which other previously approved modifications are incorporated unless it is dete rmined by the installer that the interrelationship between this change and any of those other previ ously approved modifications will introduce no adverse effect upon the airworthiness of that aircraft. Th is determination should in clude consideration of significant changes in weight distribution such as increase in the fixed disposable weight in the fuselage. 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: August 21, 1978 Date of issuance: October 27, 1978 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/sha256/4e/73/4e73de423a9402dd9d557a590eacfe79502b669715c3e5dc359b5a7c9fc0edd0) --- 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.