Aircraft STC directory
Hiller Aviation UH-12D (Army UH-23D) STCs
The Jun 30, 2026 FAA DRS snapshot contains 12 selected supplemental type certificates with status Current whose public applicability data names the Hiller Aviation UH-12D (Army UH-23D). Use it to identify modification scope and recorded holders—not to determine serial-number effectivity, compatibility, installation approval, or commercial availability.
12
listed Current at snapshot
1
holder directories
5
modification categories
Aug 19, 2005
latest recorded revision
Modification demand surface
Recorded holders
Recently revised UH-12D (Army UH-23D) STCs
Showing the 12 most recently revised records. Each entry links to the FAA source and separates public approval data from private commercial claims.
Installation of Hiller auxiliary fuel tanks kit No 72041. (UH-12D (ARMY UH-23D) modified per STC SH177WE).
FAA holder: Siam Hiller Holdings Inc
Installation and maintenance of a cabin heater system. (UH-12D (ARMY UH-23D modified per STC SH178WE).
FAA holder: Siam Hiller Holdings Inc
Installation of Soloy cargo racks.
FAA holder: Siam Hiller Holdings Inc
Installation of cargo release pedal.
FAA holder: Siam Hiller Holdings Inc
Installation of Allison 250-C20/250-C20B engine and related changes.
FAA holder: Siam Hiller Holdings Inc
Installation of an agricultural spray system. (UH-12D (ARMY UH-23D) modifier per STC).
FAA holder: Siam Hiller Holdings Inc