Pratt & Whitney Canada PT6A-27
31 aircraft on the U.S. register carry a Pratt & Whitney Canada PT6A-27 engine, rated at about 680 horsepower. The Dehavilland DHC-6 is the model most often fitted with it (21 aircraft). The aircraft carrying it were built between 1967 and 2026.
The FAA records engines by code, usually at the level of a series ("O-320 series") rather than the exact variant; this page gathers every FAA code that reads as Pratt & Whitney Canada PT6A-27 (2 codes). FAA spellings: PT6A-27 · PT6A-27.
Fitted to model families
Dehavilland DHC-621Pilatus PC-64Air Tractor Inc AT-4001Air Tractor Inc AT-4021Beechcraft 99 Airliner1Dehavilland DHC-21Frank Koinzer NF EXPLORER1Steffen Hezinger LANCAIR 4PT1
Dehavilland DHC-6 · Pilatus PC-6 · Air Tractor Inc AT-400 · Air Tractor Inc AT-402 · Beechcraft 99 Airliner · Dehavilland DHC-2 · Frank Koinzer NF EXPLORER · Steffen Hezinger LANCAIR 4PT
Where they are owner's state
Nevada10Florida3Wyoming2Washington2Texas2New Mexico2Wisconsin1Utah1Ohio1New York1
Kind of aircraft
Turboprops31 (100%)
When the aircraft were built by decade
What the FAA has certified, ordered and been told about the Pratt & Whitney Canada PT6A-27 the component layer
The design is held under 2 type certificates. The FAA has issued 11 airworthiness directives (orders that owners must comply with) that name this engine series.
FAA orders 11 airworthiness directives · newest first
2014-08-052014-11-05 · Reinforcement liner to the power turbine (PT) containment
ring and, for certain PT containment rings,... · engine
2011-12-282011-25-12 · Sun gear · engine
2002-12-312002-23-13 · Turbine Exhaust Ducts · engine
1997-03-1497-04-12 · Compressor Bleed-off Valve · engine
1992-08-1792-15-11 · Compressor Delivery Air Line (P3) Filter Assembly · engine
1990-05-3090-12-05 · Engine Overhaul · engine
Certificates and bulletins
E4EAType certificate held by Pratt & Whitney Canada CORP. · 54 models listed · revised June 16, 2021
E2NEType certificate held by Pratt & Whitney Division · 4 models listed · revised April 15, 1975
Safety bulletins 1 · advice, not orders
2011-11-01NE-12-04 · Turbine/ Turboprop Engine: Reduction Gearbox
Sources: the FAA's type certificate data sheets, airworthiness directives, supplemental type certificates, special conditions and special airworthiness information bulletins (Dynamic Regulatory System), and the FAA's service difficulty reports. A failure report is what an operator or repair station chose to file; the counts show reporting as much as reliability, and larger and commercial fleets report more. How the systems are grouped.
Connections how this engine series links to the rest of the register
Fitted to
- Dehavilland DHC-6 21 with this engine series
- Pilatus PC-6 4 with this engine series
- Air Tractor Inc AT-400 1 with this engine series
- Air Tractor Inc AT-402 1 with this engine series
- Beechcraft 99 Airliner 1 with this engine series
- Dehavilland DHC-2 1 with this engine series
Where they are
- Nevada 10 of these aircraft
- Florida 3 of these aircraft
- Wyoming 2 of these aircraft
- Washington 2 of these aircraft
- Texas 2 of these aircraft
Biggest operators
- Twin Otter International LTD 7 of these aircraft
- Woodley Aerial Leasing LLC 1 of these aircraft
- United States Department Of Commerce 1 of these aircraft
Airworthiness
- FAA orders naming the Pratt & Whitney Canada PT6A-27 11 airworthiness directives
Analytics
These connections as data: /graph/engine/pratt-whitney-canada-pt6a-27.json · about the eFlight graph.
Aircraft newest certificates first · 31
| Tail no. | Maker and model | Group | Owner and base | Certificate | Registered | Status |
|---|---|---|---|---|---|---|
| N504WJ | Dehavilland DHC-6-300 |
Fixed-wing, multi-engine | Vantage Air CORP Kalispell, Montana |
Standard | 2026-01-30 | ValidFAA registration status code V: Valid registration. All codes |
| N162DE | Dehavilland DHC-6 TWIN OTTER |
Fixed-wing, multi-engine | Tvpx Aircraft Solutions INC Trustee North Salt Lake, Utah |
Multiple | 2025-07-11 | ValidFAA registration status code V: Valid registration. All codes |
| N593UR | Dehavilland DHC-6 TWIN OTTER |
Fixed-wing, multi-engine | Ultimate Resort Vacations INC Weston, Florida |
Standard | 2025-01-13 | ValidFAA registration status code V: Valid registration. All codes |
| N92FE | Dehavilland DHC-6-300 |
Fixed-wing, multi-engine | Warren Transportation LLC Dallas, Texas |
Standard | 2024-10-09 | ValidFAA registration status code V: Valid registration. All codes |
| N856FA | Pilatus PC-6/B2-H2 |
Fixed-wing, single engine | Plane Fun INC Tr Trustee Snellville, Georgia |
Standard | 2024-07-16 | ValidFAA registration status code V: Valid registration. All codes |
| N450PP | Dehavilland DHC-6-300 |
Fixed-wing, multi-engine | J R S Sky INC Pound Ridge, New York |
Standard | 2023-11-03 | ValidFAA registration status code V: Valid registration. All codes |
| N88HE | Steffen Hezinger LANCAIR 4PT |
Fixed-wing, single engine | Stol LLC Santa Fe, New Mexico |
Experimental | 2023-07-12 | ValidFAA registration status code V: Valid registration. All codes |
| N979FA | Pilatus PC-6/B2-H4 |
Fixed-wing, single engine | Individual owner Colorado |
Standard | 2023-06-27 | ValidFAA registration status code V: Valid registration. All codes |
| N615AR | Dehavilland DHC-6-300 |
Fixed-wing, multi-engine | Twin Otter International LTD Las Vegas, Nevada |
Multiple | 2023-02-20 | ValidFAA registration status code V: Valid registration. All codes |
| N403ML | Dehavilland DHC-6-300 |
Fixed-wing, multi-engine | Dhc6-403 Equity LLC Palm Beach, Florida |
Standard | 2019-07-30 | ValidFAA registration status code V: Valid registration. All codes |
| N999CZ | Beech 99A |
Fixed-wing, multi-engine | N999Cz LLC Milwaukee, Wisconsin |
Standard | 2019-07-26 | ValidFAA registration status code V: Valid registration. All codes |
| N456SF | Dehavilland DHC 2 MK III |
Fixed-wing, single engine | Individual owner Alaska |
Standard | 2019-07-22 | ValidFAA registration status code V: Valid registration. All codes |
| N434AR | Dehavilland DHC-6-300 |
Fixed-wing, multi-engine | Twin Otter Support Services LLC Las Vegas, Nevada |
Standard | 2018-10-17 | ValidFAA registration status code V: Valid registration. All codes |
| N696EX | Frank Koinzer NF EXPLORER |
Fixed-wing, single engine | Sky West Aviation INC Trustee Albuquerque, New Mexico |
Experimental | 2018-03-21 | ValidFAA registration status code V: Valid registration. All codes |
| N488WY | Pilatus Aircraft Ltd PC-6/B2-H4 |
Fixed-wing, single engine | Flexible Flyer LLC Cody, Wyoming |
Standard | 2017-09-14 | ValidFAA registration status code V: Valid registration. All codes |
| N7MC | Dehavilland DHC-6-100 |
Fixed-wing, multi-engine | St Tammany Parish Mosquito Abatement District Slidell, Louisiana |
Standard | 2017-08-24 | ValidFAA registration status code V: Valid registration. All codes |
| N1544R | Air Tractor Inc AT-402 |
Fixed-wing, single engine | Ras Aviation LLC Elyria, Ohio |
Restricted | 2017-05-12 | ValidFAA registration status code V: Valid registration. All codes |
| N189GC | Dehavilland DHC-6-300 |
Fixed-wing, multi-engine | Cortez Fisher LLC Kirkland, Washington |
Standard | 2014-06-10 | ValidFAA registration status code V: Valid registration. All codes |
| N537AR | Dehavilland DHC-6-300 |
Fixed-wing, multi-engine | Avro LTD Las Vegas, Nevada |
Restricted | 2012-06-07 | ValidFAA registration status code V: Valid registration. All codes |
| N3655B | Air Tractor Inc AT-400A |
Fixed-wing, single engine | Woodley Aerial Leasing LLC Walnut, Illinois |
Restricted | 2012-01-21 | ValidFAA registration status code V: Valid registration. All codes |
| N190GC | Dehavilland DHC-6-300 |
Fixed-wing, multi-engine | Monarch Enterprises INC Kirkland, Washington |
Standard | 2011-05-13 | ValidFAA registration status code V: Valid registration. All codes |
| N821AR | Dehavilland DHC-6-300 |
Fixed-wing, multi-engine | Fairey LTD Las Vegas, Nevada |
Multiple | 2008-12-15 | ValidFAA registration status code V: Valid registration. All codes |
| N718KW | Dehavilland DHC-6 |
Fixed-wing, multi-engine | Warren Transportation LLC Dallas, Texas |
Standard | 2008-05-23 | ValidFAA registration status code V: Valid registration. All codes |
| N338SB | Pilatus PC-6/B2-H4 |
Fixed-wing, single engine | Switchback Aviation LLC Cody, Wyoming |
Standard | 2008-02-22 | ValidFAA registration status code V: Valid registration. All codes |
| N56RF | Dehavilland DHC-6-300 |
Fixed-wing, multi-engine | United States Department of Commerce Lakeland, Florida |
Standard | 2007-05-03 | ValidFAA registration status code V: Valid registration. All codes |
| N365AR | Dehavilland DHC-6-300 |
Fixed-wing, multi-engine | Twin Otter International LTD Las Vegas, Nevada |
Multiple | 2006-05-03 | ValidFAA registration status code V: Valid registration. All codes |
| N359AR | Dehavilland DHC-6-300 |
Fixed-wing, multi-engine | Twin Otter International LTD Las Vegas, Nevada |
Multiple | 2005-05-19 | ValidFAA registration status code V: Valid registration. All codes |
| N512AR | Dehavilland DHC-6-200 |
Fixed-wing, multi-engine | Twin Otter International LTD Las Vegas, Nevada |
Restricted | 2003-08-14 | ValidFAA registration status code V: Valid registration. All codes |
| N723AR | Dehavilland DHC-6-300 |
Fixed-wing, multi-engine | Twin Otter International LTD Las Vegas, Nevada |
Standard | 1999-11-10 | ValidFAA registration status code V: Valid registration. All codes |
| N515AR | Dehavilland DHC-6-300 |
Fixed-wing, multi-engine | Twin Otter International LTD Las Vegas, Nevada |
Restricted | 1993-10-29 | ValidFAA registration status code V: Valid registration. All codes |
| N94AR | Dehavilland DHC-6-300 |
Fixed-wing, multi-engine | Twin Otter International LTD Las Vegas, Nevada |
Multiple | 1987-06-19 | ValidFAA registration status code V: Valid registration. All codes |
Source: FAA Civil Aviation Registry, Releasable Aircraft Database (the engine reference table and each aircraft's engine code), October 5, 2026. Horsepower and thrust are the FAA's figures for the series, not for a particular aircraft.