# STC SA4-915 - Type: Supplemental type certificate - Status: Current, Reissued - Holder: General Aviation Modifications Inc., United States - Description: Installation of Brittain Mark II20-gallon wing tip tanks(P/N 2009). - Applied: July 24, 1958 - Status date: February 7, 2020 - Product: Aircraft, Single-Engine - Certification basis: Part 21 - Data sheets: [TCDS A-782](https://openairdocs.org/tcds/A-782) - Certificate PDF: https://openairdocs.org/files/sha256/27/9b/279bcb614ccb7375444cd9eb82922768f672060449ac54857b4c60ef5fa4ba74 - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/BEA6F1ECC863E7708625854500769EF1.0001 - DRS record last changed: December 5, 2025 - Page: https://openairdocs.org/stc/SA4-915 ## ADs that name it (0) None. ## Approved models (1) - Navion Aircraft Company Ltd. Navion Series ([TCDS A-782](https://openairdocs.org/tcds/A-782)) ## 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. Original Product --Type Certificate N umber : Installation of Brittain Mark II 20 gallon wing tip tanks (P/N 2009) in accordance with Installation Manual TT2-1, dated November 21, 1959, or later FAA approved revisions. Brittain Aircraft Enterprises FAA Approved Airplane Flight Manual Supplement dated March 2, 1983, lists applicable eligible aircraft models and approved maximum weights for each model. Drawings needed to manufacture parts required for this modification are Nos 2008 (N/C and 2009 (Rev. E) and EOs #2-002, #2-003. The approval of this change in type design applied basically to Standard Navion(s) A, B, D, E, F 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. (Continued on Page 3) General Aviation Modifications, Inc. 2800 Airport Road Ada, OK 74820 A-782 M ake : Navion Aircraft Company M odel : Navion Series * Date reissued : 11/10/1969; 08/17/1987; 02/02/1971; 03/01/2016; 02/07/2020 Date amended : 01/04/1960; 04/14/1983; 05/14/19 84 B y direction of the A dministrator (Signature) Monica Nemecek Manager, Airframe & Administrative Section Chicago ACO Branch (Title) Date of appl ication : July 24, 1958 Date of issuance : September 10, 1959 FAA FORM 8110-2-1(10-69) PAGE 2 of 3 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) FAA FORM 8110-2-1(10-69) PAGE 3 of 3 PAGES N umber SA4-915 Date of issuance: September 10, 1959 Date Amended : May 14, 1984 Date Reissued: February 7, 2020 Limitations and Conditions ( Continued): When tip tanks are installed in accordance with technical data referenced on this Supplemental Type Certificate the gross weight limitation of each model aircraft is governed by the horsepower on the power plant as follows: *Navion Model A aircraft with approved engine installations of 240 horsepower or greater, are eligible for 3100 lbs. gross weight when tip tanks are installed in accordance with these noted data. (I) 9/10/59 (A) 1/4/60 (R) 11/10/69 (R) 2/2/71 (A) 4/14/83 (A) 5/14/84 (R) 8/17/87 (R) 3/1/16 -----END---- ## Every issue (2) - February 7, 2020: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/27/9b/279bcb614ccb7375444cd9eb82922768f672060449ac54857b4c60ef5fa4ba74) - March 1, 2016: Reissued, Historical. [certificate](https://openairdocs.org/files/sha256/af/07/af076ec9416dc40d314db0ac0b01b7641614ac415b838396432405d8b763adf7) --- 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.