# STC SA1012NW - Type: Supplemental type certificate - Status: Current, Reissued - Holder: Air Mods NW, United States - Description: Installation of auxiliary fuel tank models 2 TAFTA and 4 TAFTA and incresed gross weight - Applied: August 18, 1980 - Status date: August 20, 2019 - Product: Aircraft, Small Airplane - Certification basis: Part 21, Part 23 - Data sheets: [TCDS A11EA](https://openairdocs.org/tcds/A11EA) - Certificate PDF: https://openairdocs.org/files/sha256/d9/5f/d95f55c22ed1e63212066a9fd7e6efcedc09206bc3186c272c4303f6442975d4 - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/E5A5DE1F9C557851862585D8003B5FEC.0001 - DRS record last changed: December 5, 2025 - Page: https://openairdocs.org/stc/SA1012NW ## ADs that name it (0) None. ## Approved models (4) - True Flight Holdings LLC AA-1 ([TCDS A11EA](https://openairdocs.org/tcds/A11EA)) - True Flight Holdings LLC AA-1A ([TCDS A11EA](https://openairdocs.org/tcds/A11EA)) - True Flight Holdings LLC AA-1B ([TCDS A11EA](https://openairdocs.org/tcds/A11EA)) - True Flight Holdings LLC AA-1C ([TCDS A11EA](https://openairdocs.org/tcds/A11EA)) ## 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. United States of America Department of Transportation - Federal Aviation Administration Supplemental Type Certificate Number SA1012NW This certificate, issued to Air Mods N.W. 1424 Ridge Ave Snohomish, WA 98290 Part 23 of the Federal Aviation Regulation, Original ProductType Certificate Number: A11EA Make: Gulfstream American (Grumman) Model: AA-1, AA-1A, AA-1B, and AA-1C Description of the Type Design Change: Installation of auxiliary fuel tank models 2 TAFTA and 4 TAFTA and increased gross weight in accordance with, Weston M. Howard and A1-E. Smith Installation Instructions No. HS101. Limitations and Conditions: Approval of this change in type design applies to the above model aircraft only. This approval should not be extended to other aircraft of this model series unless the installer determines that the relationship between this change and any other previously incorporated approved modifications will introduce no adverse effect upon the airworthiness of that aircraft. A copy of this certificate, and Addendum No. SA1012NM must be maintained as part of the permanent records of the modified 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. (See Continuation Sheet Pages 3 of 4) Date of application: August 18, 1980 Date reissued: July 17, 1984; August 20, 2019 Date of issuance: August 28, 1980 Date amended: January 29, 1982 FAA FORM 8110-2 (5/14) PAGE 1 OF 4 PAGES By direction of the Administrator (Signature) Manager, Seattle ACO Branch (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: 1987-763-289 United States of America Department of Transportation - Federal Aviation Administration Supplemental Type Certificate (Continuation Sheet) Number SA1012NW SUPPLEMENTAL TYPE CERTIFICATE ADDENDUM NO. SA1012NW The conditions and limitations of Type Certificate Data Sheet (TCDS) Number A11EA apply except where superseded by the following: This Supplemental Type Certificate Type Data Sheet, which is part of STC SA1012NW, prescribes the conditions and limitations under which the product for which the STC was issued meets the airworthiness requirements of the Federal Aviation Regulations. SUPPLEMENTAL TYPE CERTIFICATE HOLDER: Air Mods N.W. 1. GULFSTREAM AMERICAN (GRUMMAN) AA-1, AA-1A, AA-1B, AND AA-1C (NORMAL AND UTILITY CATEGORY) AS MODIFIED BY STC SA1012NW. Note 1: (a) Install placards in accordance with Weston M. Howard and Al E. Smith Drawing No. HS101-1D-4, and HS101-1D-5. In addition, install the following placard in full view of the pilot: **AUXULIARY FUEL TRANSFER** TRANSFER AUXILIARY FUEL IN LEVE FLIGHT ONLY AND ONLY AFTER THE MAIN TANK IS ½ FULL OR LESS. TURN OFF WHEN TRANSFER IS COMPLETE **9.2 GALLONS USEABLE.** (b) In full view of the pilot (for appropriate airplane): TAKE-OFF GROSS WEIGHT FOR THE AA-1 WITH STC SA1012NW INSTALLED, NORMAL CATEGORY, IS 1579 POUNDS. LANDING WEIGHT – 1500 POUNDS. OR TAKE-OFF GROSS WEIGHT FOR THE AA-1A WITH STC SA1012NW INSTALLED, NORMAL CATEGORY, IS 1579 POUNDS. LANDING WEIGHT – 1500 POUNDS. OR **FAA FORM 8110-2 (5/14) PAGE 3 OF 4 PAGES** United States of America Department of Transportation - Federal Aviation Administration Supplemental Type Certificate (Continuation Sheet) Number SA1012NW Supplemental Type Certificate Addendum No. SA1012NW TAKE-OFF GROSS WEIGHT FOR THE AA-1B WITH STC SA1012NW INSTALLED, NORMAL CATEGORY, IS 1642 POUNDS. LANDING WEIGHT – 1560 POUNDS. OR TAKE-OFF GROSS WEIGHT FOR THE AA-1C WITH STC SA1012NW INSTALLED, NORMAL CATEGORY, IS 1684 POUNDS. LANDING WEIGHT – 1600 POUNDS. - END - **FAA FORM 8110-2 (5/14) PAGE 4 OF 4 PAGES** ## Every issue (2) - August 20, 2019: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/d9/5f/d95f55c22ed1e63212066a9fd7e6efcedc09206bc3186c272c4303f6442975d4) - July 17, 1984: Reissued, Historical. [certificate](https://openairdocs.org/files/sha256/5a/10/5a1043c3358f04b84ded27a50569a73be40f368ad95017d12e90b7180f3b6d37) --- 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.