# STC SA3841NM - Type: Supplemental type certificate - Status: Current, Reissued - Holder: Air Mods NW, United States - Description: Installation of a Lycoming O-360-F1A6 engine and a McCauley B2D34C propeller - Applied: February 24, 1987 - Status date: August 20, 2019 - Product: Aircraft, Small Airplane - Certification basis: Part 21, Part 23 - Data sheets: [TCDS A16EA](https://openairdocs.org/tcds/A16EA) - Certificate PDF: https://openairdocs.org/files/sha256/54/68/5468a74f348eedd00cc9f207228a8fbd97524dc803efdc22a33bd215822687ba - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/3E9AB045EF492FB0862585DE00399C33.0001 - DRS record last changed: December 5, 2025 - Page: https://openairdocs.org/stc/SA3841NM ## ADs that name it (0) None. ## Approved models (1) - True Flight Holdings LLC AA-5A ([TCDS A16EA](https://openairdocs.org/tcds/A16EA)) ## 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 This certificate has been reissued to replace the original certificate reported lost. Number SA3841NM 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: A16EA Make: Gulfstream Model: AA-5A Description of the Type Design Change: Installation of a Lycoming 0-360-F1A6 engine and a McCauley B2D34C propeller in accordance with Air Mods N.W. photos 1 thru 16, dated 5/1/1987, and sketches 1 and 2 dated 5/1/1987. Limitations and Conditions: Approval of this Data pertaining to this modification are considered inadequate for duplication in other aircraft. This approval is limited to the installation in Gulfstream American AA -5A, Serial No. AA5A-0564 only. A copy of this certificate, STC continuation Sheet SA384NM, and Pilots Operating Handbook Supplement shall be maintained as part of the permanent records for the modified aircraft, Date of application: February 24, 1987 Date reissued: August 20, 2019 Date of issuance: June 11, 1987 Date amended: FAA FORM 8110-2 (5/14) PAGE 1 OF 3 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 This certificate has been reissued to replace the original certificate reported lost. Number SA3841NM SUPPLEMENTAL TYPE CERTIFICATE ADDENDUM NO. SA3841NM Air Mods N.W. Issued: June 11, 1987 Reissued: August 20, 2019 Amended: The Conditions and Limitations of Type Certificate Data Sheet (TCDS) Number SA3841NM apply except where superseded by the following: This Supplemental Type Certificate Data Sheet, which is a part of STC SA3841NM, prescribes the conditions and limitations under which the product for which the STC was issued meets the airworthiness requirements of the Federal Air Regulations. SUPPLEMENTAL TYPE CERTIFICATE HOLDER Air Mods N.W. Model AA-5A (Normal/Utility Category) as modified by STC SA3841NM Engine: 0-360-F1A6 Fuel: 100LL/100 minimum grade aviation gasoline Engine Limits 2700 RPM (180 HP) Avoid 1750 to 2050 RPM at less than 10” M.P. Propeller and Propeller Limits: McCauley constant speed propeller a. B2D34C220 hub with 80VHA-3.5 blades b. Governor McCauley C290D3/T18 or C161031-0112 c. Spinner, Cessna Dwg. 2450002 C.G. Range: No change Maximum Gross Weight: No change Instrument Markings: Tachometer redline at 2700 RPM Placards: Adjacent to each fuel cap: “Fuel Minimum 100 Octane” On instrument panel below manifold pressure Gauge: with less than 10 inches manifold pressure, avoid continuous operation between 1750/2050 RPM - END - **FAA FORM 8110-2 (5/14) PAGE 3 OF 3 PAGES** ## Every issue (2) - August 20, 2019: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/54/68/5468a74f348eedd00cc9f207228a8fbd97524dc803efdc22a33bd215822687ba) - June 11, 1987: Issued, Historical. [certificate](https://openairdocs.org/files/sha256/bf/ab/bfab7ca3ceb88a2f933f5bb0aa2afb4910cc395b02370f43731c7ab797322d45) --- 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.