# STC SA2129NM - Type: Supplemental type certificate - Status: Current, Reissued - Holder: Air Mods NW, United States - Description: Installation of a Lycoming O-320-E2G engine, AA-5A engine mount, cowling, air induction, and a McCauley 1C172/ SBTM/7359 propeller. - Applied: April 22, 1983 - 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/sha256/61/b3/61b3790df9886e4d1d7e8e2927ac2b7ee98641934fa8824f6718eeb6b092cb90 - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/2B522428FCAA1F5C862585D8003B6075.0001 - DRS record last changed: December 5, 2025 - Page: https://openairdocs.org/stc/SA2129NM ## ADs that name it (0) None. ## Approved models (1) - Tiger Aircraft 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 SA2129NM 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 Model: AA-1C Description of the Type Design Change: Installation of a Lycoming 0-320-E2G, AA-5A engine mount, cowling, air induction and a McCauley 1C172/SBTM/7359 propeller in accordance with, per Ameromod Corporation photographs 1 through 3. Limitations and Conditions: Data pertaining to this modification are considered inadequate for duplication in other aircraft. This approval is limited to the installation in Gulfstream America n AA-1C, Serial Number AA1C-00119 only. A copy of this Certificate and Addendum shall be maintained as part of the permanent records for the modified aircraft. Date of application: April 22, 1983 Date reissued: April 8, 1991; August 20, 2019 Date of issuance: July 19, 1983 Date amended: 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 SA2129NM SUPPLEMENTAL TYPE CERTIFICATE ADDENDUM NO. SA2129NM The conditions and limitations of Type Certificate Data Sheet (TCDS) No. A11EA apply except where superseded by the following: This Supplemental Type Certificate Addendum, which is part of STC SA2129NM, prescribes the conditions and limitations under which the product for which the STC was issued meets the airworthiness requirements of the Federal Aviation Regulations. A copy of this STC Addendum is required to b e maintained as part of the permanent records for the modified aircraft. SUPPLEMENTAL TYPE CERTIFICATE HOLDER: Air Mods N.W. **1. GULFSTREAM AMERICAN AA-1C, 2PCLM (UTILITY CATEGORY) AS MODIFIED BY STC SA2129NM** Engine: Lycoming 0-320-E2G Fuel: 80/87 octane minimum grade aviation gasoline Engine Limits: Takeoff 2700 RPM (150 HP) @ sea level Maximum continuous-2700 RPM full throttle Propeller and Propeller Limits: McCauley 1C172/SBTM/7359 Diameter: 74” Maximum; 70” Minimum Spinner: Gulfstream American SK143-1 Powerplant Instruments: Mark Instruments as follows: Oil Temperature Red Line 245°F – maximum Oil Pressure Green Arc 60 to 90 psi - normal operating range Yellow Arc 25 to 60 psi – caution Red Line 90 psi maximum Tachometer: Red Line 2700 rpm – maximum Fuel Pressure Green Arc.50 to 8.0 psi – normal operating range Red Line 8.0 psi – maximum at sea level **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) This certificate has been reissued to replace the original certificate reported lost. Number SA2129NM SUPPLEMENTAL TYPE CERTIFICATE ADDENDUM NO. SA2129NM Powerplant Instruments (Cont’d): Cylinder Head Temperature (Well-type Thermocouple): Red Line 500° F – Maximum C.G. Range: See Type Certificate Data Sheet A11EA Maximum Weight: See Type Certificate Data Sheet A11EA Placards: The following placard is to be in front and in full view of the pilot: -NOTICE- AIRCRAFT MODIFIED WITH LYCOMING 0-320-E2G ENGINE (150 H.P. @ 2700 RPM) CONSULT APPROVED STC ADDENDUM SA2129NM **AIRCRAFT BALLAST REQUIRED ON ALL FLIGHTS.** **PERFORM WEIGHT & BALANCE ANALYSIS PRIOR TO EACH FLIGHT.** Install placard by fuel filler ports to read: **80/87 OCTANE MIN. GRADE AVIATION GASOLINE** -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/sha256/61/b3/61b3790df9886e4d1d7e8e2927ac2b7ee98641934fa8824f6718eeb6b092cb90) - April 8, 1991: Reissued, Historical. [certificate](https://openairdocs.org/files/sha256/aa/f2/aaf21d8146fccae39420a87b29b7be6be6ff2c8cb33663d6bc0fd074ee75c69c) --- 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.