Pratt & Whitney Canada PT6A-27
Pratt & Whitney Canada PT6A-27 is a PT6A-family turboprop model used on DHC-6 Series 300 aircraft and offered as the standard engine on current Twin Otter variants. Pratt & Whitney describes the PT6A architecture as a two-shaft engine with a multi-stage compressor, single-stage compressor turbine, independent free power turbine, and epicyclic concentric reduction gearbox. The structured model rating is 462.3 kW, normalized from the current DHC-6 specification of 620 shaft horsepower.
Identity
- Aliases
- PT6A-27PT6A 27
- Domains
- aviation
- Identity Level
- model
- Kind
- turboprop
- Name
- Pratt & Whitney Canada PT6A-27
- Status
- active
Details
- Air Breathing Specs
- Shaft Power Kw
- 462.3
- Description
- Pratt & Whitney Canada PT6A-27 is a PT6A-family turboprop model used on DHC-6 Series 300 aircraft and offered as the standard engine on current Twin Otter variants. Pratt & Whitney describes the PT6A architecture as a two-shaft engine with a multi-stage compressor, single-stage compressor turbine, independent free power turbine, and epicyclic concentric reduction gearbox. The structured model rating is 462.3 kW, normalized from the current DHC-6 specification of 620 shaft horsepower.
- Developers
- Family
- Manufacturers
Links
- Official Url
- https://dehavilland.com/twin-otter-guardian/
Assets & Meta
- Creation Time
- August 1, 2026 at 18:55:14 UTC
- Updated Time
- August 23, 2026 at 19:43:22 UTC
Other
- Sources
- Accessed Date
- 2026-08-01
- Note
- The type-certificate holder identifies PT6A-27 as the standard Twin Otter engine and PT6A-34 as the optional higher-power alternative.
- Publisher
- De Havilland Aircraft of Canada Limited
- Title
- Twin Otter Guardian
- Accessed Date
- 2026-08-01
- Note
- The report's type history identifies the DHC-6 Series 300 as the definitive version with uprated PT6A-27 engines.
- Publisher
- Civil Aviation Authority of New Zealand
- Title
- DHC-6 Series 100 Type Acceptance Report TAR 96/02
- Accessed Date
- 2026-08-01
- Note
- The FAA registry record for a DHC-6-300 identifies engine model PT6A-27 and two-engine turboprop configuration.
- Publisher
- Federal Aviation Administration
- Title
- FAA aircraft registry — DHC-6-300
- Accessed Date
- 2026-08-22
- Note
- De Havilland Canada's current DHC-6 Twin Otter Classic 300-G specifications list the PT6A-27 option at 620 shaft horsepower, supporting the normalized 462.3 kW shaft-power field.
- Publisher
- De Havilland Aircraft of Canada Limited
- Title
- DHC-6 Twin Otter Classic 300-G Floats Specifications
- Accessed Date
- 2026-08-23
- Note
- Pratt & Whitney describes the PT6A as a two-shaft engine with a multi-stage compressor, single-stage compressor turbine, independent power turbine, and epicyclic concentric reduction gearbox; its applications list includes PT6A-27.
- Publisher
- Pratt & Whitney
- Title
- PT6A Engine