# STC ST00001LB-D - Type: Supplemental type certificate - Status: Current, Reissued - Holder: United Airlines Inc, United States - Description: Extend Business Class into D - Zone section, changing seat count from 36F-126C-184Y to 36F-123C-142Y. Remove (42) Coach Class seats and (3) Business Class seats. Rework (123) Business Class seats to provide 12" recline and install seats at increased 48" - 50" pitch in C-Zone, D-Zone, and Upper Deck. Install (2) outboard class divider curtains in D-Zone. This modification was accomplished in accordance with United Air Lines, DAS-1-WE, Approved Master Drawing List No. 00001 dated January 24, 1995, or later FAA approved revisions. - Applied: December 1, 1994 - 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/f5/7d/f57d7a09d4bedb1dabd85393d5cb0f3ea33ff87b4c890adc7978a698248daf1d - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/9630B9617646E5818625799500658092.0001 - DRS record last changed: December 5, 2025 - Page: https://openairdocs.org/stc/ST00001LB-D ## ADs that name it (0) None. ## Approved models (1) - The Boeing Company 747-400 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 Regulations. Ref. Type Certificate Data Sheet A20WE for Special Conditions Original Product Type Certificate Number : A20WE Boeing 767-400 Series Description of Type Design Change: Extend Business Class into D – Zone section, changing seat count from 36F-126C-184Y to 36F-123C-142Y. Remove (42) Coach Class seats and (3) Business Class seats. Rework (123) Business Class seats to provide 12” reclin e and install seats at increased 48” - 50” pitch in C-Zone, D-Zone, and Upper Deck. Install (2) out board class divider curtains in D-Zone. This modification was accomplished in accordance with United Air Lines, DAS-1-WE, Approved Master Drawing List No. 00001 dated January 24, 1995, or later FAA approved revisions. Limitations and Conditions: This approval does not extend to other aircraft of this model on which other previously approved modifications are incorporated unless it is determined by the installer 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 aircraft. This determination should include consideration of significant changes in weight dist ribution such as an increase in the fixed disposable weight in the fuselage. If the holder agrees to perm it 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: December 1, 1994 Date of issuance: January 24, 1995 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/f5/7d/f57d7a09d4bedb1dabd85393d5cb0f3ea33ff87b4c890adc7978a698248daf1d) --- 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.