# STC SA3363WE-D - Type: Supplemental type certificate - Status: Current, Reissued - Holder: United Airlines Inc, United States - Description: Installation of dual Collins FD-109A Flight Director systems - Applied: March 1, 1978 - 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/sha256/9b/a8/9ba832bfbc1640e89d990d38404bf0bb19d23cd8c44d6bb7961c57d27b098065 - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/5EC71CBE944678908625799700734DCF.0001 - DRS record last changed: December 6, 2025 - Page: https://openairdocs.org/stc/SA3363WE-D ## ADs that name it (0) None. ## Approved models (1) - The Boeing Company 727 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. 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 A3WE. A3WE Boeing 727-022 Description of Type Design Change : Installation of dual Collins FD-109A Flight Director systems in accordance with DAS-1-WE Approved United Air Lines Drawing List No . 3363, dated April 21, 1978, or later FAA approved revisions. United Air Lines FAA Approved Flight Ma nual Supplement on FD-109A Flight Directors dated April 21, 1978, for Boeing 727 Airplane Flight Manual D6-8727.1/D6-8727.1C is required as part of this installation. Limitations and Conditions: The approval of this change in type d esign applies basically to 727-022 only. This approval does not extend to other aircraft of this mode l on which other previously approved modifications are 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 a dverse effect upon the airworthiness of that aircraft. This determination should include cons ideration of significant changes in we ight 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 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: March 1, 1978 Date of issuance: April 24, 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/sha256/9b/a8/9ba832bfbc1640e89d990d38404bf0bb19d23cd8c44d6bb7961c57d27b098065) --- 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.