FAA-listed STC holder
Diamond Upgrades, LLC STCs
The Jun 30, 2026 FAA DRS snapshot lists 3 selected supplemental type certificates with status Current under Diamond Upgrades, LLC. The records span 3 public aircraft directories and 1 modification categories. This is a research directory, not a claim that any specific kit or service is currently offered.
Modification mix
Recently revised records
Showing the 3 most recently revised records. Category directories provide the complete paginated discovery path.
3 displayed records.
Search every indexed record for this holder. The table below contains the recently revised records shown on this page.
| STC and modification | Aircraft / model / TC | Source status and dates | Holder and authority |
|---|---|---|---|
SH7961SW-DInstallation of two Allison 250-C20R engines.Other aircraft modificationsView record |
| Current at cited snapshot Application: | FAA holder: Diamond Upgrades, LLC FAA authority record |
SH7962SW-DInstallation of two Allison 250-C20R engines and enhanced antitorque system.Other aircraft modificationsView record |
| Current at cited snapshot Application: | FAA holder: Diamond Upgrades, LLC FAA authority record |
SR01180LAInstallation of Pratt & Whitney PT6T-3DF Twin-Pack in place of PT6T-3B, -3BE, -3BF, -3BG Twin Pack.Other aircraft modificationsView record |
| Current at cited snapshot Application: | FAA holder: Diamond Upgrades, LLC FAA authority record |