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Aircraft STC directory

Learjet Learjet 55B STCs

The Jun 30, 2026 FAA DRS snapshot contains 21 selected supplemental type certificates with status Current whose public applicability data names the Learjet Learjet 55B. Use it to identify modification scope and recorded holders—not to determine serial-number effectivity, compatibility, installation approval, or commercial availability.

21
listed Current at snapshot
6
holder directories
8
modification categories
May 10, 2019
latest recorded revision

Modification demand surface

Avionics8
Other aircraft modifications5
Safety and emergency equipment3
Cargo and special mission1
Fuel systems1
Engine and powerplant1
Electrical systems1
Cabin and interiors1

Recorded holders

Learjet Inc.14Duncan Aviation Inc2LifePort LLC1Spectrum Aeromed LLC dba Spectrum Aeromed1Avcon Industries Inc1Landmark Aviation1

Recently revised Learjet 55B STCs

Showing the 21 most recently revised records. Each entry links to the FAA source and separates public approval data from private commercial claims.