# STC SA5994NM-D - Type: Supplemental type certificate - Status: Current, Reissued - Holder: United Airlines Inc, United States - Description: : Install fireproof blankets on the engine fan-reverser intermediate seal core area replacing the fireproof insulating coating (MA255) in accordance with United Air Lines, DAS-1-WE, Approved Drawing List No. 5994 dated August 30, 1994, or later FAA approved revisions. - Applied: August 30, 1994 - Status date: November 30, 2011 - Product: Aircraft, Large Multi-Engine - Certification basis: Part 21, Part 25 - Data sheets: [TCDS A1NM](https://openairdocs.org/tcds/A1NM) - Certificate PDF: https://openairdocs.org/files/sha256/3c/8e/3c8e7b7c4ee38f5d6d7939fd654bfc722b1850c398b7087fe141f49fc4e56420 - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/FFBA78F736C79B3D862579980050578C.0001 - DRS record last changed: December 6, 2025 - Page: https://openairdocs.org/stc/SA5994NM-D ## ADs that name it (0) None. ## Approved models (2) - The Boeing Company 767 ([TCDS A1NM](https://openairdocs.org/tcds/A1NM)) - The Boeing Company 767-200 Series ([TCDS A1NM](https://openairdocs.org/tcds/A1NM)) ## 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 Original Product Type Certificate Number : A1NM Boeing 767-222 (JT9D-7R Engine) Description of Type Design Change : Install fireproof blankets on the engine fan-reverser intermediate seal core area replacing the fireproof insulating coating (MA255) in accordance with United Air Lines, DAS-1-WE, Approved Drawing List No . 5994 dated August 30, 1994, or later FAA approved revisions. Limitations and Conditions: This is an aircraft Supplemental Type Certificate because the requirement is a part 25 requirement (ยง 25.1191). Howeve r, the fire blanket is fitted on the engine thrust reverser, which is part of the engine type certifi cate. This approval should not be extended to other specific engines of this model on which other previ ously approved modifications are incorporated 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 ai rworthiness of that engine installation. If the holder agrees to permit another person to use this certif icate 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 30, 1994 Date of issuance: August 31, 1994 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/sha256/3c/8e/3c8e7b7c4ee38f5d6d7939fd654bfc722b1850c398b7087fe141f49fc4e56420) --- 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.