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Aircraft STC directory

Sikorsky Aircraft S-55 STCs

The Jun 30, 2026 FAA DRS snapshot contains 5 selected supplemental type certificates with status Current whose public applicability data names the Sikorsky Aircraft S-55. Use it to identify modification scope and recorded holders—not to determine serial-number effectivity, compatibility, installation approval, or commercial availability.

5
listed Current at snapshot
2
holder directories
3
modification categories
Jun 7, 2010
latest recorded revision

Modification demand surface

Engine and powerplant2Cabin and interiors2Landing gear and brakes1

Recorded holders

Whisper Jet Inc.4Skybound Manufacturing Inc.1

Recently revised S-55 STCs

Showing the 5 most recently revised records. Each entry links to the FAA source and separates public approval data from private commercial claims.