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Aircraft STC directory

Siller Helicopters CH-54A STCs

The Jun 30, 2026 FAA DRS snapshot contains 8 selected supplemental type certificates with status Current whose public applicability data names the Siller Helicopters CH-54A. Use it to identify modification scope and recorded holders—not to determine serial-number effectivity, compatibility, installation approval, or commercial availability.

8
listed Current at snapshot
3
holder directories
3
modification categories
Mar 11, 2025
latest recorded revision

Modification demand surface

Other aircraft modifications4
Rotorcraft modifications2
Fuel systems2

Recorded holders

Helicopter Transport Services LLC4Erickson Air Crane Inc. dba Erickson Air-Crane2Simplex Manufacturing Company1

Recently revised CH-54A STCs

Showing the 8 most recently revised records. Each entry links to the FAA source and separates public approval data from private commercial claims.