Aircraft STC directory
Raytheon Aircraft H18 STCs
The Jun 30, 2026 FAA DRS snapshot contains 30 selected supplemental type certificates with status Current whose public applicability data names the Raytheon Aircraft H18. 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 H18 STCs
Showing the 30 most recently revised records. Each entry links to the FAA source and separates public approval data from private commercial claims.
Installation of Grimes three-light strobe system as a supplemental light system.
FAA holder: Honeywell International Inc.
Twin-engine electronic sychronizer for aircraft equipped with Hartzell propellers.
FAA holder: Ontic Engineering and Manufacturing 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.
Nose strut snubber installation.
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 pilot cockpit door.
FAA holder: SOUTHWESTERN AERO EXCHANGE INC.
Replacement of round window between Bulkhead Nos. 9 and 10 with Beech Super 18 type window.
FAA holder: SOUTHWESTERN AERO EXCHANGE INC.
Installation of Stewart-Warner Model 8259-A heater.
FAA holder: SOUTHWESTERN AERO EXCHANGE INC.
Modification for increase in maximum weights.
FAA holder: Staggerwing Museum Foundation Inc.
Installation of United Aircraft of Canada Ltd. PT6 series engines.
FAA holder: Staggerwing Museum Foundation Inc.
Install crack detection system.
FAA holder: Staggerwing Museum Foundation Inc.
Installation of fuselage aft cargo door.
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 cockpit exterior door.
FAA holder: Staggerwing Museum Foundation Inc.
Installation of pilot cockpit door.
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.
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.