# STC SA4-918 - Type: Supplemental type certificate - Status: Current, Reissued - Holder: United Airlines Inc, United States - Description: 1. Aircraft wiring in accordance with Douglas Aircraft Co. Service Change #17 (UAL COA-0-1456) to provide an operational Aircraft Flight Data Rrecorder conforming to CAR Amendment 40-6, paragraph 40.208 with the following additions to assure recording of data during takeoff and landing roll: a. Relay to provide automatic start of recording when nose landing gear reaches airborne condition on takeoff. b. Time delay relay to turn off recorder one minute after nose landing gear reaches "on ground" condition, on landing. c. Installation of standard toggle switch on Systems Engineer's Console, to permit Second Officer to turn on recorder at start of takeoff run. 2. Install Waste King Flight Data Recorder #5424, TSO-C51. - Applied: September 11, 1989 - 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/sha256/7a/d6/7ad60e3db1ab8126ee96f2f2a785b26135765de45ee6e51108674f3449b6e037 - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/B62DA8B1A8671CCD86257995007342CB.0001 - DRS record last changed: December 6, 2025 - Page: https://openairdocs.org/stc/SA4-918 ## ADs that name it (0) None. ## Approved models (27) - The Boeing Company DC-8-11 ([TCDS 4A25](https://openairdocs.org/tcds/4A25)) - The Boeing Company DC-8-12 ([TCDS 4A25](https://openairdocs.org/tcds/4A25)) - The Boeing Company DC-8-21 ([TCDS 4A25](https://openairdocs.org/tcds/4A25)) - The Boeing Company DC-8-31 ([TCDS 4A25](https://openairdocs.org/tcds/4A25)) - The Boeing Company DC-8-32 ([TCDS 4A25](https://openairdocs.org/tcds/4A25)) - The Boeing Company DC-8-33 ([TCDS 4A25](https://openairdocs.org/tcds/4A25)) - The Boeing Company DC-8-41 ([TCDS 4A25](https://openairdocs.org/tcds/4A25)) - The Boeing Company DC-8-42 ([TCDS 4A25](https://openairdocs.org/tcds/4A25)) - The Boeing Company DC-8-43 ([TCDS 4A25](https://openairdocs.org/tcds/4A25)) - The Boeing Company DC-8-51 ([TCDS 4A25](https://openairdocs.org/tcds/4A25)) - The Boeing Company DC-8-52 ([TCDS 4A25](https://openairdocs.org/tcds/4A25)) - The Boeing Company DC-8-53 ([TCDS 4A25](https://openairdocs.org/tcds/4A25)) - The Boeing Company DC-8-55 ([TCDS 4A25](https://openairdocs.org/tcds/4A25)) - The Boeing Company DC-8-61 ([TCDS 4A25](https://openairdocs.org/tcds/4A25)) - The Boeing Company DC-8-61F ([TCDS 4A25](https://openairdocs.org/tcds/4A25)) - The Boeing Company DC-8-62 ([TCDS 4A25](https://openairdocs.org/tcds/4A25)) - The Boeing Company DC-8-62F ([TCDS 4A25](https://openairdocs.org/tcds/4A25)) - The Boeing Company DC-8-63 ([TCDS 4A25](https://openairdocs.org/tcds/4A25)) - The Boeing Company DC-8-63F ([TCDS 4A25](https://openairdocs.org/tcds/4A25)) - The Boeing Company DC-8-71 ([TCDS 4A25](https://openairdocs.org/tcds/4A25)) - The Boeing Company DC-8-71F ([TCDS 4A25](https://openairdocs.org/tcds/4A25)) - The Boeing Company DC-8-72 ([TCDS 4A25](https://openairdocs.org/tcds/4A25)) - The Boeing Company DC-8-72F ([TCDS 4A25](https://openairdocs.org/tcds/4A25)) - The Boeing Company DC-8-73 ([TCDS 4A25](https://openairdocs.org/tcds/4A25)) - The Boeing Company DC-8-73F ([TCDS 4A25](https://openairdocs.org/tcds/4A25)) - The Boeing Company DC-8F-54 ([TCDS 4A25](https://openairdocs.org/tcds/4A25)) - The Boeing Company DC-8F-55 ([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 Certification basis Amendment 40-6, para. 40.208 effective September 9, 1957 Original Product Type Certificate Number : 4A25 Boeing DC-8 Description of Type Design Change: 1. Aircraft wiring in accordance with Douglas Aircraft Co. Service Change #17 (UAL COA-0-1456) to provide an operational Aircraft Flight Data Rrecorder conformi ng to CAR Amendment 40-6, paragraph 40.208 with the following additions to assure recording of data during takeoff and landing roll: a. Relay to provide automatic start of recording when nose landing g ear reaches airborne condition on takeoff. b. Time delay relay to turn off recorder one minute after nose landing gear reaches “on ground” condition, on landing. c. Installation of standard toggle switch on Systems Engineer’s Console, to permit Second Officer to turn on recorder at start of takeoff run. 2. Install Waste King Flight Data Recorder #5424, TSO-C51. Limitations and Conditions: This approval should not be extended to ot her specific aircraft of this model on which other previously approved modifications are incorpor ated 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. 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: September 11, 1959 Date of issuance: September 18, 1959 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/sha256/7a/d6/7ad60e3db1ab8126ee96f2f2a785b26135765de45ee6e51108674f3449b6e037) --- 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.