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Aircraft STC directory

Learjet Learjet 55 STCs

The Jun 30, 2026 FAA DRS snapshot contains 47 selected supplemental type certificates with status Current whose public applicability data names the Learjet Learjet 55. Use it to identify modification scope and recorded holders—not to determine serial-number effectivity, compatibility, installation approval, or commercial availability.

47
listed Current at snapshot
13
holder directories
10
modification categories
Sep 17, 2022
latest recorded revision

Modification demand surface

Avionics18
Other aircraft modifications13
Safety and emergency equipment5
Engine and powerplant3
Cargo and special mission2
Aircraft connectivity2
Landing gear and brakes1
Fuel systems1
Electrical systems1
Cabin and interiors1

Recorded holders

Learjet Inc.33Duncan Aviation Inc2Kaman Corporation Aircraft Wheel and Brake LLC1LifePort LLC1Spectrum Aeromed LLC dba Spectrum Aeromed1Pro Star Aviation, LLC1Paul/ Lanna Egan LLC1Avcon Industries Inc1Standard Aero1Landmark Aviation1Insight Instrument Corporation1Goodrich Avionics Systems Inc1Fargo Jet Center1

Recently revised Learjet 55 STCs

Showing the 47 most recently revised records. Each entry links to the FAA source and separates public approval data from private commercial claims.