Aircraft STC directory
Raytheon Aircraft D18S STCs
The Jun 30, 2026 FAA DRS snapshot contains 69 selected supplemental type certificates with status Current whose public applicability data names the Raytheon Aircraft D18S. Use it to identify modification scope and recorded holders—not to determine serial-number effectivity, compatibility, installation approval, or commercial availability.
Modification demand surface
Recently revised D18S STCs
Showing the 69 most recently revised records. Each entry links to the FAA source and separates public approval data from private commercial claims.
Twin-engine electronic sychronizer for aircraft equipped with Hartzell propellers.
FAA holder: Ontic Engineering and Manufacturing Inc.
Installation of Fiberglas Nose.
FAA holder: Staggerwing Museum Foundation Inc.
Modifications for increase in maximum weights.
FAA holder: Staggerwing Museum Foundation Inc.
Installed Volpar Mark IV tricycle landing gear.
FAA holder: SOUTHWESTERN AERO EXCHANGE INC.
Installation of Volpar Tricycle Landing Gear.
FAA holder: SOUTHWESTERN AERO EXCHANGE INC.
Installation of AiResearch TPE 331-1-101B engines and increase gross weight to 11500 pounds.
FAA holder: SOUTHWESTERN AERO EXCHANGE INC.
Installation of square topped stair cabin door.
FAA holder: SOUTHWESTERN AERO EXCHANGE INC.
Installation of Tricycle landing gear and nose assembly.
FAA holder: SOUTHWESTERN AERO EXCHANGE INC.
Installation of Tricycle landing gear and revised nose assembly with optional radome.
FAA holder: SOUTHWESTERN AERO EXCHANGE INC.
Removal of the main cabin entrance door and installation of stair door.
FAA holder: SOUTHWESTERN AERO EXCHANGE INC.
Installation of Stewart-Warner Model 8259-A heater.
FAA holder: SOUTHWESTERN AERO EXCHANGE INC.
Cambridge fuel air ratio analyzers.
FAA holder: Staggerwing Museum Foundation Inc.
Modification for increase in maximum weights.
FAA holder: Staggerwing Museum Foundation Inc.
Carburetor air scoops.
FAA holder: Staggerwing Museum Foundation Inc.
Main landing gear doors.
FAA holder: Staggerwing Museum Foundation Inc.
Beech Kit 581-1, except angle of incidence change (Item 602) and stall strips (Item 607c) of Spec. A-765; with STC SA2-383, with or without STC's SA2-204 and SA3-409; and wing spar mod. Maximum gross weight: takeoff 9,500 lbs., landing 9,400 lbs.
FAA holder: Staggerwing Museum Foundation Inc.
Cabin modified to G18 configuration.
FAA holder: Staggerwing Museum Foundation Inc.
Propeller spinners and increase in maximum continuous power to 450 hp.
FAA holder: Staggerwing Museum Foundation Inc.
Three additional windows.
FAA holder: Staggerwing Museum Foundation Inc.
Installed American Turbine Engine Co. drawing B-138 divan.
FAA holder: Staggerwing Museum Foundation Inc.
Installed auxiliary nose fuel tanks per American Turbine Engine Company Drawing B-3, Sheet 1, Sheet 2 and Sheet 3.
FAA holder: Staggerwing Museum Foundation Inc.
Installation of United Aircraft of Canada Ltd. PT6 series engines.
FAA holder: Staggerwing Museum Foundation Inc.
Cargo door in fuselage.
FAA holder: Staggerwing Museum Foundation Inc.
Install crack detection system.
FAA holder: Staggerwing Museum Foundation Inc.
Installation of Interior Arrangements.
FAA holder: Staggerwing Museum Foundation Inc.
Installation of cockpit exterior door on left side.
FAA holder: Staggerwing Museum Foundation Inc.
Installation of Bendix Model M-4C automatic flight control system.
FAA holder: Staggerwing Museum Foundation Inc.
Installation of cargo floor.
FAA holder: Staggerwing Museum Foundation Inc.
Installation of cargo pod.
FAA holder: Staggerwing Museum Foundation Inc.
Installation of spar strap extension to outboard wing panel.
FAA holder: Staggerwing Museum Foundation Inc.
A Bendix M-4C Autopilot System is installed.
FAA holder: Staggerwing Museum Foundation Inc.
Removal of fabric covering from the wing flaps, ailerons, rudders and elevators and replace and recover these surfaces with aluminum.
FAA holder: Staggerwing Museum Foundation Inc.
Two 42.5-gallon auxiliary fuel tanks.
FAA holder: Staggerwing Museum Foundation Inc.
Installation of stair type entrance door, rectangular windows and outside opening baggage compartment.
FAA holder: Staggerwing Museum Foundation Inc.
Installation of two combustion heaters in nose for model D18S, serial number 99 ONLY.
FAA holder: Staggerwing Museum Foundation Inc.
Installation of two-piece plexi- glass windshield.
FAA holder: Hamilton Avn Co Inc
Installation of 37-gallon auxiliary fuel tank in each outboard wing.
FAA holder: Staggerwing Museum Foundation Inc.
Increase in gross weight to 10,100 pounds. When aircraft has been modified, installation of nacelle vent manifold optional.
FAA holder: Staggerwing Museum Foundation Inc.
Modification of horizontal stabilizer and attachment to provide 1-1/2 degree angle of incidence increase and elevator down spring installation.
FAA holder: Staggerwing Museum Foundation Inc.
Modification made per FAA sealed summary, Drawing 25600, Sheet 3.
FAA holder: Staggerwing Museum Foundation Inc.
Installation of revised carburetor air mixing chamber and ram airscoop.
FAA holder: Staggerwing Museum Foundation Inc.
Install cargo door; metalized ailerons, elevator, rudders, wing flaps.
FAA holder: Quint Nicholas M
Installation of wing tips per FAA Sealed Drawing No s. ASP-2029 and API-2030.
FAA holder: SOUTHWESTERN AERO EXCHANGE INC.
Modify existing cabin port hole windows.
FAA holder: Staggerwing Museum Foundation Inc.
Installation of baggage compartment.
FAA holder: Staggerwing Museum Foundation Inc.
Nose section modification including E18S type nose cone and cover assembly installation of radar and radio racks.
FAA holder: Staggerwing Museum Foundation Inc.
Type E18S tail wheel fork and truss assembly.
FAA holder: Staggerwing Museum Foundation Inc.
Installation of one only, standard cabin window between bulkheads #8 and #9 right side opposite cabin door.
FAA holder: Staggerwing Museum Foundation Inc.
Surrendered and incorporated into STC SA00478CH.
FAA holder: Cooper Aviation Supply Company, Inc.