# STC SA4-1028 - Type: Supplemental type certificate - Status: Current, Reissued - Holder: General Aviation Modifications Inc.., United States - Description: Installation of Brittain Industries 20-gallon wing tip tanks. - Applied: January 11, 1960 - Status date: February 7, 2020 - Product: Aircraft, Small Multi-Engine - Data sheets: [TCDS 2A1](https://openairdocs.org/tcds/2A1) - Certificate PDF: https://openairdocs.org/files/sha256/8a/87/8a878ff5d997d0df020d851da672db9bfa33b31738e4a74ae018ecde5f4abda3 - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/E89FC3EFD7B7648E862585450076F10E.0001 - DRS record last changed: December 5, 2025 - Page: https://openairdocs.org/stc/SA4-1028 ## ADs that name it (0) None. ## Approved models (2) - Multitech Engineering Corporation D-16 ([TCDS 2A1](https://openairdocs.org/tcds/2A1)) - Multitech Engineering Corporation D-16A ([TCDS 2A1](https://openairdocs.org/tcds/2A1)) ## 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. Part 3 of the Federal Aviation R egulations. (See Type Certificate Data Sheet No. 2A1 for complete certification basis) Original Product --Type Certificate N umber : Installation of Brittain Industries 20 gallon wing tip tanks installed per Brittain Installation Dwg. No. 3009, Installation Manual TT3-1, dated December 29, 1959, Report No. 39 and Drawing Nos. 3605A, 3606A, an d 3607B. The approval of this change in type design applied basically to Standard Universal Twin Navion models D-16 and D- 16A aircraft only. This approval should not be extended 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 change and any of those other previously approved modifications will introduce no adverse effect upon the airworthiness of that aircraft. 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. General Aviation Modifications, Inc. 2800 Airport Road Ada, OK 74820 2A1 M ake : Universal Twin Navion M odel : D-16, D-16A Date reissued : 11/10/1969; 09/17/1987; 02/02/1971; 03/1/2016; 02/07/2020 Date amended : B y direction of the A dministrator (Signature) Monica Nemecek Manager, Airframe & Administrative Section Chicago ACO Branch (Title) Date of application : January 11, 1960 Date of issuance : January 25, 1960 FAA FORM 8110-2-1(10-69) PAGE 2 of 2 PAGES 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 of type) (Address of grantor) (Number and street) (City, State, and ZIP code) ## Every issue (2) - February 7, 2020: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/8a/87/8a878ff5d997d0df020d851da672db9bfa33b31738e4a74ae018ecde5f4abda3) - March 1, 2016: Reissued, Historical. [certificate](https://openairdocs.org/files/sha256/86/70/8670bd21ba634f137a2ffdb8ce44c0371bf1e18f85ac087da4e1f7674facfe88) --- 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.