# STC SA2750WE - Type: Supplemental type certificate - Status: Current, Reissued - Holder: United Airlines Inc, United States - Description: Modification of aircraft for installation of spacer pallets. (747-122) - Applied: November 10, 1972 - 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/f0/90/f090cd1cd8cd60eb4f94993be0dab26fe7fc20e1c4624efcb7ad0ba6606fadff - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/362BF670D0DB5BC886257998004EE3C9.0001 - DRS record last changed: December 6, 2025 - Page: https://openairdocs.org/stc/SA2750WE ## ADs that name it (0) None. ## Approved models (1) - The Boeing Company 747 ([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. See Type Certificate Data Sheet A20WE. Original Product Type Certificate Number : A20WE Make: Boeing Model: 747-122 Description of Type Design Change: Modification of the Boeing 747-122 airc raft for the installation of spacer pallets in accordance with FAA Approved Drawing List No. 501, or later FAA approved revisions. Limitations and Conditions : The approval of this change in the type design applied basically to the Boeing 747-122 airplane only. This approval should not be extended to other airc raft of this model on which other previously approved modifications are incorporated unless it is determined by the installer that the interrelationship between this change and any of those other previously a pproved modifications will introduce no adverse effect upon the airworthiness of that aircraft. This determina tion should include consideration of significant changes in weight distribution such as an increase in the fixed dispos able weight in the fuselage. If the holder agrees to permit another person to use this certificate to alter the product, the holder shall give the other person written evidence of that permission. Date of application : November 10, 1972 Date of issuance : September 7, 1973 Date reissued : November 30, 2011 ( Signature) Haifa Haj-Eid Supervisor, Technical & Administrative Support Staff Los Angeles Aircraft Certification Office ( Title) Transfer the ownership of Supplemental Type Certificate Number to (Name of transferee) (Address of transferee) (Number and street) (City, State, and ZIP Code) from (Name of grantor) (Print or type) (Address of grantor) (Number and street) (City, State, and ZIP Code) Signature of grantor (In ink): U.S. GPO 1987-763-28 ## Every issue (2) - November 30, 2011: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/f0/90/f090cd1cd8cd60eb4f94993be0dab26fe7fc20e1c4624efcb7ad0ba6606fadff) - September 7, 1973: Issued, Historical. [certificate](https://openairdocs.org/files/sha256/c0/60/c060d9d2c40280b51cfd9fe2ad47d25fdeb350c25c586f377d61764c33635cd7) --- 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.