# STC SA2744NM-D - Type: Supplemental type certificate - Status: Current, Reissued - Holder: United Airlines Inc, United States - Description: Replace first, business, coach class seats. Change seat count from 18F-62C-344Y to 18F/70C-305Y. - Applied: July 26, 1991 - Status date: November 30, 2011 - Product: Aircraft, Large Multi-Engine - Certification basis: Part 21, Part 25 - Data sheets: [TCDS A20WE](https://openairdocs.org/tcds/A20WE) - Certificate PDF: https://openairdocs.org/files/sha256/ae/c7/aec76097d9967b5f64d9871c99a1788c135dcb0352fa5150eef52c5dcebeac12 - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/AD677FDA07B7498A8625799E007269E3.0001 - DRS record last changed: December 6, 2025 - Page: https://openairdocs.org/stc/SA2744NM-D ## ADs that name it (1) - [AD 90-17-05](https://openairdocs.org/ad/90-17-05): Airplane Flight Manual (AFM) Changes - Fuel ยท Textron 400, MU-300 and MU-300-10 with STC SA1596NM or 2 others. Effective Sep 17, 1990. Named in the applicability ## Approved models (1) - The Boeing Company 747-100 Series ([TCDS A20WE](https://openairdocs.org/tcds/A20WE)) ## 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 RlOriginal Product Type Certificate Number : A20WE Boeing 747-100 Series Description of Type Design Change: Replace first, business, coach class seats. Change the seat count from 18F-62C-344Y to 18F-70C-305Y. New first class seats utilize electric footrests. New business class seats seat seven across. Install four new class dividers and duty free unit. Install video monitors, pods, and screens at specific locations. This installation is in accordance with United Air Lines DAS-1-WE Approved Drawing List No. 2744 dated August 21, 1991, or later FAA approved revisions. Limitations and Conditions: This approval does not be extend to other aircraft of this model on which other previously approved modifications ar e 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 adverse e ffect upon the airworthiness of that aircraft. This determination should include consideration of significant changes in weight 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 to alter th e 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: July 26, 1991 Date of issuance: August 21, 1991 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/ae/c7/aec76097d9967b5f64d9871c99a1788c135dcb0352fa5150eef52c5dcebeac12) --- 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.