SA377NWOther aircraft modifications
Installation of Hartzell HC-B3W30-2E/W10160R-6 and/or W10160-6 propellers, governors, and spinners on Pratt and Whitney R-985 series engines.
FAA holder: Kenmore Air Harbor Inc
Aircraft STC directory
Hawker Beechcraft D18S STCs
The Jun 30, 2026 FAA DRS snapshot contains 29 selected supplemental type certificates with status Current whose public applicability data names the Hawker Beechcraft D18S. Use it to identify modification scope and recorded holders—not to determine serial-number effectivity, compatibility, installation approval, or commercial availability.
29
listed Current at snapshot
5
holder directories
8
modification categories
Apr 5, 2019
latest recorded revision
Modification demand surface
Other aircraft modifications8
Landing gear and brakes6
Aircraft structures4
Aircraft performance4
Engine and powerplant3
Fuel systems2
Propellers1
Flight controls1
Recently revised D18S STCs
Showing the 29 most recently revised records. Each entry links to the FAA source and separates public approval data from private commercial claims.
View record
SA97CEAircraft structures
Installation of Hoskins Supplemental High Intensity Position Light System consisting of Model A or B Wing Tip Lights, Model C or D Tail Lights with or without Model 1 or 2 Fuselage Lights.
FAA holder: BF Goodrich Aerospace
SA2-433Other aircraft modifications
Installation of a carburetor air induction system.
FAA holder: BlackHawk Aircraft Maintenance Inc.
SA4-32Other aircraft modifications
Internal combustion heaters.
FAA holder: Staggerwing Museum Foundation Inc.
SA1-398Engine and powerplant
Pratt & Whitney R-985 engine installation with Simmonds Aero- cessories 580047 fuel injector.
FAA holder: Staggerwing Museum Foundation Inc.
SA1-427Engine and powerplant
Pratt & Whitney R-985 engine installation with Simmonds Aero- cessories 580047 fuel injector per STC SE1-391, and takeoff weight increase to 9,800 lbs. and landing weight to 9,400 lbs. per STC SA2-820.
FAA holder: Staggerwing Museum Foundation Inc.
SA2-1230Landing gear and brakes
Installation of extended tail wheel assembly.
FAA holder: Staggerwing Museum Foundation Inc.
SA2-1246Aircraft performance
Increase in take-off Gross Weight to10,200 pounds and landing weight to9800 pounds. Extension of Aft. C.G. limits to +120.5 at 10,200 pounds.
FAA holder: Staggerwing Museum Foundation Inc.
SA2-1261Landing gear and brakes
Install Fiberglas bubble tail wheel enclosure doors (enclosing entire wheel).
FAA holder: Staggerwing Museum Foundation Inc.
SA2-204Other aircraft modifications
Installation of one-peice windshield and flush cockpit side-windows.
FAA holder: Staggerwing Museum Foundation Inc.
SA2-213Aircraft structures
Installation of modified wing tips.
FAA holder: Staggerwing Museum Foundation Inc.
SA2-328Propellers
Installation of Hartzell propeller unfeathering crossfeed system.
FAA holder: Staggerwing Museum Foundation Inc.
SA2-338Landing gear and brakes
Installation of two (2) 25,000 BTU Janitrol Heaters installed one (1) in each wheel well.
FAA holder: Staggerwing Museum Foundation Inc.
SA2-383Flight controls
Raise horizontal stabilizer and installation of elevator seal assembly.
FAA holder: Staggerwing Museum Foundation Inc.
SA2-725Other aircraft modifications
Installation of oil cooler, G & O Mfg. Co. #E703, modified with Fullerton Syphon DV5 thermostat.
FAA holder: Staggerwing Museum Foundation Inc.
SA2-820Aircraft performance
Increase in take-off weight to 9800 pounds, and increase in landing weight to 9400 pounds, when P&W R-985-AN14B;-AN4 (modified per P&W Special Instruction No. 15F-45) or -AN10 (modified per P&W Special Instruction No. 15F-45) or -AN-1M1(with the Stromberg NAR-9B-19 carburetor with 2-3/4 inch venturi) is installed.
FAA holder: Staggerwing Museum Foundation Inc.
SA2-992Fuel systems
Installation of P&W R-985 Fuel Injection Engines, as modified by STC SE1-391.
FAA holder: Staggerwing Museum Foundation Inc.
SA24CEOther aircraft modifications
Oval passenger windows.
FAA holder: Staggerwing Museum Foundation Inc.
SA27SOAircraft performance
Increase in landing weight to 9800 lbs. and extension of Aft. C.G. limits to +120.5. These limitations applicable to Beech D18S, C45H, TC45G, TC45H when modified to Airline Training Inc. CONRAD 9800 D.
FAA holder: Staggerwing Museum Foundation Inc.
SA31SOLanding gear and brakes
Tricycle landing gear and revised nose assembly with optional radome. (Model may also be designated as Conrad 10,200.).
FAA holder: Staggerwing Museum Foundation Inc.
SA4-113Engine and powerplant
Safety performance kit, increase gross weight to 9,000 lbs. takeoff and landing. Installation of P&W R-985-AN10, (Modified per P&W Special Instruction No. 15F-45 and eligible on C-45G, C45H, TC45G, & TC45H only), R-985-AN4 (modified per P&W Special Instruction No. 15F-45) or -AN14B Engine, associated powerplant installation changes, wheel well doors, and elevator hinge gap seals.
FAA holder: Staggerwing Museum Foundation Inc.
SA4-119Other aircraft modifications
Revised horizontal stabilizer angle of incidence from -2 degrees to -1/2 degrees.
FAA holder: Staggerwing Museum Foundation Inc.
SA4-152Landing gear and brakes
Two Model 940 Stewart-Warner heaters, install one in each wheel well.
FAA holder: Staggerwing Museum Foundation Inc.
SA53CEAircraft structures
Stewart-Warner heater 940B/24 in fuselage.
FAA holder: Staggerwing Museum Foundation Inc.
SA817GLFuel systems
Installation of a digital fuel flow indicating system.
FAA holder: Shadin Avionics
SA8075SW (PAGE 3)Other aircraft modifications
Installation of fiberglass covering. (M-62 SERIES PT-19) (G-73 SCHWEIZER).
FAA holder: Razorback Fabrics Inc