# STC SA3952WE-D - Type: Supplemental type certificate - Status: Current, Reissued - Holder: United Airlines Inc, United States - Description: Modifies the aircraft to install a single Tracor VLF Omega Navigation System for navigation. - Applied: October 14, 1980 - 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/sha256/58/76/58764c0be761176bf3336aad5470ffd66acccddbbfeadae92fe8513e1e48fa97 - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/6A226A99B7B3B77986257998005A1185.0001 - DRS record last changed: December 5, 2025 - Page: https://openairdocs.org/stc/SA3952WE-D ## ADs that name it (1) - [AD 94-17-13](https://openairdocs.org/ad/94-17-13): Grease Fitting Holes · Two Lycoming TIO-540-A2B, or N2BD turbocharged engines and two… (Javelin Conversions STC SA2082WE or 2 others). Effective Sep 15, 1994. Named in the applicability ## 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. 600 Jefferson Street Houston, Texas 77002 Part 4b of the Civil Air Regulations Original Product Type Certificate Number : A3WE Boeing 727-222 Description of Type Design Change : Modifies the aircraft to install a single Tracor VLF Omega Navigation System for navigation. The installation is in acco rdance with DAS-1-WE Approved United Air Lines Drawing List COA 7-2966, dated December 5, 1980, or later F AA approved revision. United Air Lines FAA Approved Flight Manual Supplement to Boeing Flight Manual Docu ment No. D6-8728, dated November 29, 1967, or later FAA approved revisions is required as part of this installation. Limitations and Conditions: The approval of this change in type design applies basically to 727-222 only . This approval should not be extended to other specific airpla nes of this model on which other previously approved modifications are incorporated, unless it is determined that the interrelationship between this change and any of those other previously approved modifications will in troduce no adverse effect upon the airworthiness of that aircraft. 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: October 14, 1980 Date of issuance: November 11, 1980 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/sha256/58/76/58764c0be761176bf3336aad5470ffd66acccddbbfeadae92fe8513e1e48fa97) --- 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.