# STC ST09735AC - Type: Supplemental type certificate - Status: Current, Reissued - Holder: United Airlines Inc, United States - Description: 737-800 Slimline Lavatory and Economy Class Seat Modification - Applied: December 19, 2013 - Status date: August 5, 2017 - Product: Aircraft, Large Airplane - Certification basis: Part 21, Part 25 - Data sheets: [TCDS A16WE](https://openairdocs.org/tcds/A16WE) - Certificate PDF: https://openairdocs.org/files/sha256/e5/fe/e5fed0b150ca5168f03d47edfa6bd4971358717f2aa9d87617ef316dd6f42fbb - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/31F45206290AC8B48625822D004DAD95.0001 - DRS record last changed: December 5, 2025 - Page: https://openairdocs.org/stc/ST09735AC ## ADs that name it (0) None. ## Approved models (1) - The Boeing Company 737-800 Series ([TCDS A16WE](https://openairdocs.org/tcds/A16WE)) ## 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. FAA Form 8110-2 (5/14) Page 1 of 3 Number: ST09735AC This certificate issued to: United Airlines 600 Jefferson St. Houston, TX 77002 Part 25 of the Federal Aviation Regulations Original Product – Type Certificate Number: Make: The Boeing Company A16WE Model: 737-800 Series Description of Type Design Change: 737-800 Slimline Lavatory and Economy Class Seat Modification (HIC Exempt) in accordance with United Airlines Master Drawing List 2520DA13570 Revision C, dated July 30, 2014or later FAA approved revision. Instructions for Continued Airworthiness, Document Number 2500R01168C, dated May 7, 2014 and EWIS Source Document N0455-D79, dated April 11, 2014 or later FAA approved revisions are required for this installation. No AFM Supplement is required for this modification. 1) The installation should not be incorporated in any aircraft unless it is determined that the interrelationship between this installation and any previously approved configuration will not introduce any adverse effect upon the airworthiness of the aircraft. 2) If the holder agrees to permit another person to use this certificate to alter a product, the holder must give the other person written evidence of that permission. 3) Prior installation of United Airlines, Inc. Supplemental Type Certificate ST09712AC is required for the installation of this STC. Date of Application: December 19, 2013 Date Reissued: February 1, 2016; August 5, 2017 Date of Issuance: August 1, 2014 Date Amended: By Direction of the Administrator Signature Title Patrick Ashton, STC Administrator United Airlines Organization Designation Authorization FAA Form 8110-2 (5/14) Page 2 of 3 Transfer Endorsement Transfer the ownership of Supplemental Type Certificate Number: ST09735AC To (Name and address of transferee) From (Name and address of grantor) FAA Form 8110-2 (5/14) Page 3 of 3 United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate (Continuation Sheet) Number: ST09735AC Certification Basis: Based on 14 CFR § 21.115 and § 21.101, and the FAA policy for design changes that are not significant in FAA Order 8110.48, the certification basis for this modification is as follows: a. The type certification basis for parts not changed or not affected by the change is shown in TCDS A16WE. b. The certification basis for parts changed or affected by this modification since the reference application date December 19, 2013, is based upon the type certification basis shown in TCDS A16WE with the following exceptions. 14 CFR Part Amdt 14 CFR Part Amdt 25.783 (j) 88 25.1365 123 25.853 (a)(d)(e)(f)(g)(h) 83 c. The modification certification basis also includes Special Conditions Number 25-358-SC, dated August 9, 2007. --END-- FAA Form 8110-2 (5/14) Page 4 of 3 United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate (Continuation Sheet) Number: ST09735AC FAA Form 8110-2 (5/14) Page 5 of 3 United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate (Continuation Sheet) Number: ST09735AC FAA Form 8110-2 (5/14) Page 6 of 3 United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate (Continuation Sheet) Number: ST09735AC ## Every issue (2) - August 5, 2017: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/e5/fe/e5fed0b150ca5168f03d47edfa6bd4971358717f2aa9d87617ef316dd6f42fbb) - August 1, 2014: Issued, Historical. [certificate](https://openairdocs.org/files/sha256/17/4d/174df7b3a95091338c7e52a895149019faa35a26fffaa031e0910958ad64c865) --- From OpenAirDocs.org, an independent open copy of FAA and NTSB data. Only the Federal Register edition on govinfo.gov is the official legal text of an AD.