SE000ENOther aircraft modifications
Engines will be maintained IAW 'Maintenance or Reliable Engines(MORE) Program,' Rev 4, dated 8/16/95.
FAA holder: MORE Company Inc
Aircraft STC directory
Pratt & Whitney Canada PT6A-21 STCs
The Jun 30, 2026 FAA DRS snapshot contains 8 selected supplemental type certificates with status Current whose public applicability data names the Pratt & Whitney Canada PT6A-21. 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
5
holder directories
3
modification categories
Oct 4, 2022
latest recorded revision
Modification demand surface
Engine and powerplant4
Other aircraft modifications2
Fuel systems2
Recently revised PT6A-21 STCs
Showing the 8 most recently revised records. Each entry links to the FAA source and separates public approval data from private commercial claims.
View record
SE10947SCEngine and powerplant
The conversion of the Pratt & Whitney Canada, Model PT6A-21 to a PT6A-28 turboprop engine.
FAA holder: Prime Turbines
SE02290NYEngine and powerplant
Conversion of a Pratt & Whitney Canada PT6A-21 engine to operate as a PT6A-27 or -28 engine.
FAA holder: Vector Aerospace Engine Services Atlantic Inc.
SE00014ENEngine and powerplant
Installation of the Pratt & Whitney Engine Services, Inc. CrossCheck Engine Monitor Kit P/N HUMS-K-071-1, Rev. A on the specified PT6A engine models and kit P/N HUMS-K-071-2 on the specified A250 engine models.
FAA holder: Pratt & Whitney Engine Services Inc.
SE00020ENEngine and powerplant
Installation of the Pratt & Whitney Engine Services, Inc. TrendCheck/ TrendCheck Plus Engine Monitor Kit P/N TREND-K-010-1.
FAA holder: Pratt & Whitney Engine Services Inc.
SE2960SOOther aircraft modifications
Installation of an oil filler cap safety adapter.
FAA holder: Jet Avion Corporation
SE01805NYFuel systems
Installation of Fuel Nozzle Adapters using studs and nuts.
FAA holder: Atlantic Turbines International Inc.