SA1103WECabin and interiors
ONE ONLY STC Model G-44A S/N 1427, R/N N414U only - Installation of Stewart Warner cabin heater.
FAA holder: Seaplane Works Inc.
FAA-listed STC holder
Seaplane Works Inc. STCs
The Jun 30, 2026 FAA DRS snapshot lists 22 selected supplemental type certificates with status Current under Seaplane Works Inc.. The records span 6 public aircraft directories and 7 modification categories. This is a research directory, not a claim that any specific kit or service is currently offered.
22
listed Current at snapshot
6
aircraft directories
7
modification categories
Aug 4, 2010
latest recorded revision
Modification mix
Other aircraft modifications11
Aircraft structures3
Cabin and interiors2
Engine and powerplant2
Flight controls2
Safety and emergency equipment1
Fuel systems1
Recently revised records
Showing the 22 most recently revised records. Category directories provide the complete paginated discovery path.
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SA380WEEngine and powerplant
Any of the engine and propeller combinations listed on the Continuation sheet, page 3 of this STC with associated modifications of the nacelle, electric system, propeller and engine controls, oil, fuel and vacuum system; installation of new engine mount and reinforced and modified wing structures; installation of spray rails, rudder boost system and oil cooler.
FAA holder: Seaplane Works Inc.
SA4-111Other aircraft modifications
Installation of Lycoming GO-480-C1D6 engines and Hartzell propellers, HC-83X20-2C/9333-C3 propellers, and associated modifications.
FAA holder: Seaplane Works Inc.
SA4-287Flight controls
Changing Elevator Trim Tab Setting as follows: Original Setting - 10 deg Up 33 deg Down New Tab Setting - 22 deg Up 17 deg Down.
FAA holder: Seaplane Works Inc.
SA4-296Safety and emergency equipment
ONE ONLY STC Model G-44A, (N41984 only) - Modification of empennage control system to eliminate interference with escape hatch.
FAA holder: Seaplane Works Inc.
SA4-467Other aircraft modifications
ONE ONLY STC Model G-44 (S/N 1415, CF-KPT only) - Installation of four Teco Model TE-432 seats.
FAA holder: Seaplane Works Inc.
SA4-64Other aircraft modifications
Installation of Lycoming GO-435-C2B engines, Hartzell HC-82X20-2A/9333C-3 or HC-83X20-2A/8433-0 propellers, and associated modifications.
FAA holder: Seaplane Works Inc.
SA4-65Other aircraft modifications
Installation of Lycoming GO-480-B1D engines, Hartzell HC-83X20-2A/8433-0 or HC-83X20-2A/8433H propellers, and associated modifications.
FAA holder: Seaplane Works Inc.
SA4-67Aircraft structures
Installation of window in right-hand side of hull.
FAA holder: Seaplane Works Inc.
SA4-928Other aircraft modifications
Retractable tip float installation.
FAA holder: Seaplane Works Inc.
SA4-958Fuel systems
Increase in capacity of each main fuel tank from 54 to 88 gallons.
FAA holder: Seaplane Works Inc.
SA4-959Other aircraft modifications
Stewart Warner heater installation.
FAA holder: Seaplane Works Inc.
SA4-961Cabin and interiors
Metal cabin door and frame assembly and installation.
FAA holder: Seaplane Works Inc.
SA4-964Other aircraft modifications
Landing light assembly and installation.
FAA holder: Seaplane Works Inc.
SA4-970Other aircraft modifications
Installation of four Teco Model TE-432 seats.
FAA holder: Seaplane Works Inc.
SA4774NMEngine and powerplant
Removal of the two existing engines and installation of one AVCO Lycoming Model TIO-540-J2BD and one LTIO-540-J2BD engine with Hartzell Model HC-C3YR-2UF/FC9587A-10 and HC-C3YR-2LUF/FJC9587A-10 propellers.
FAA holder: Seaplane Works Inc.