# STC SA1139NW-D - Type: Supplemental type certificate - Status: Current, Reissued - Holder: United Airlines Inc, United States - Description: Install fireproof blankets on Engine Fan Reverser Intermediate Fireseal in lieu of Fireproof Intumescent Coating. - Applied: October 1, 1982 - Status date: November 30, 2011 - Product: Engine - Certification basis: Part 21, Part 25 - Data sheets: [TCDS E23EA](https://openairdocs.org/tcds/E23EA) - Certificate PDF: https://openairdocs.org/files/sha256/28/2e/282e44af31fd23e41966ae1f8733917ffa318ed4b9512b41abb94c6b8c864e32 - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/F72E0A3C8E3A5EE8862579A50078E6FF.0001 - DRS record last changed: December 6, 2025 - Page: https://openairdocs.org/stc/SA1139NW-D ## ADs that name it (0) None. ## Approved models (15) - General Electric Company CF6-45A ([TCDS E23EA](https://openairdocs.org/tcds/E23EA)) - General Electric Company CF6-45A2 ([TCDS E23EA](https://openairdocs.org/tcds/E23EA)) - General Electric Company CF6-50A ([TCDS E23EA](https://openairdocs.org/tcds/E23EA)) - General Electric Company CF6-50C ([TCDS E23EA](https://openairdocs.org/tcds/E23EA)) - General Electric Company CF6-50C1 ([TCDS E23EA](https://openairdocs.org/tcds/E23EA)) - General Electric Company CF6-50C2 ([TCDS E23EA](https://openairdocs.org/tcds/E23EA)) - General Electric Company CF6-50C2B ([TCDS E23EA](https://openairdocs.org/tcds/E23EA)) - General Electric Company CF6-50CA ([TCDS E23EA](https://openairdocs.org/tcds/E23EA)) - General Electric Company CF6-50E ([TCDS E23EA](https://openairdocs.org/tcds/E23EA)) - General Electric Company CF6-50E1 ([TCDS E23EA](https://openairdocs.org/tcds/E23EA)) - General Electric Company CF6-50E2 ([TCDS E23EA](https://openairdocs.org/tcds/E23EA)) - General Electric Company CF6-50E2B ([TCDS E23EA](https://openairdocs.org/tcds/E23EA)) - General Electric Company CF6-6D ([TCDS E23EA](https://openairdocs.org/tcds/E23EA)) - General Electric Company CF6-6D1 ([TCDS E23EA](https://openairdocs.org/tcds/E23EA)) - General Electric Company CF6-6D1A ([TCDS E23EA](https://openairdocs.org/tcds/E23EA)) ## 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 25 of the Federal Aviation Regulations. E23EA General Electric CF6-6D, -6D-1, -6D1A, -50A, -50CA, -50C, -50C1, -50C2, -45A, -50C2B, -50E, -50E1, -50E2, -50E2B, -45A2 Description of Type Design Change: Install fireproof blankets on the E ngine Fan Reverser Intermediate Fireseal, in accordance of Fireproof Intumescent Co ating in accordance with United Air Lines DAS-1- WE, Drawing List No. 1139 dated December 10, 1982, or later FAA approved revisions. Limitations and Conditions: This is an aircraft STC because the requirement is a Part 25 requirement ยง 25.1191. However, the fire blanket is fitted on the e ngine thrust reverser which is part of the engine type certificate. This approval should not be extende d to other specific aircrafts of this model on which other previously approved modifications are in corporated, unless it is determined that the interrelationship between this cha nge and any of those other previ ously approved modifications will introduce no adverse effect upon the airworthiness of th at engine installation. If the holder agrees to permit another person to use this certificate to alte r 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 1, 1982 Date of issuance: December 15, 1982 Date reissued: November 30, 2011 Date amended: June 20, 1991, May 28, 1985 ( 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/sha256/28/2e/282e44af31fd23e41966ae1f8733917ffa318ed4b9512b41abb94c6b8c864e32) --- 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.