Pratt & Whitney PT6A-27
28 aircraft on the U.S. register carry a Pratt & Whitney PT6A-27 engine, rated at about 680 horsepower. The Dehavilland DHC-6 is the model most often fitted with it (10 aircraft). The aircraft carrying it were built between 1965 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 PT6A-27. FAA spelling: PT6A-27.
Fitted to model families
Dehavilland DHC-610Air Tractor Inc AT-4006Pilatus PC-66Dehavilland DHC-22Air Tractor Inc AT-4021Beech A991Dehavilland BEAVER DHC-2 MK.31Piper PA-46 Malibu, Mirage, Matrix and M-Class1
Model families, as a table
| aircraft | |
|---|---|
| Dehavilland DHC-6 | 10 |
| Air Tractor Inc AT-400 | 6 |
| Pilatus PC-6 | 6 |
| Dehavilland DHC-2 | 2 |
| Air Tractor Inc AT-402 | 1 |
| Beech A99 | 1 |
| Dehavilland BEAVER DHC-2 MK.3 | 1 |
| Piper PA-46 Malibu, Mirage, Matrix and M-Class | 1 |
Dehavilland DHC-6 · Air Tractor Inc AT-400 · Pilatus PC-6 · Dehavilland DHC-2 · Air Tractor Inc AT-402 · Beech A99 · Dehavilland BEAVER DHC-2 MK.3 · Piper PA-46 Malibu, Mirage, Matrix and M-Class
Where they are owner's state
What the FAA has certified, ordered and been told about the Pratt & Whitney PT6A-27 the component layer
No FAA order in the current files names this engine series. Operators and repair shops have filed 642 failure reports with the FAA since 1995, 11 of them in the last ten years.
Failure reports 642 since · what operators and shops told the FAA
Failure reports by year, as a table
| reports | |
|---|---|
| 95 | 4 |
| 96 | 57 |
| 97 | 40 |
| 98 | 32 |
| 99 | 29 |
| 00 | 40 |
| 01 | 22 |
| 02 | 17 |
| 03 | 27 |
| 04 | 30 |
| 05 | 31 |
| 06 | 41 |
| 07 | 57 |
| 08 | 49 |
| 09 | 28 |
| 10 | 16 |
| 11 | 17 |
| 12 | 24 |
| 13 | 18 |
| 14 | 18 |
| 15 | 26 |
| 16 | 8 |
| 17 | 1 |
| 19 | 3 |
| 20 | 1 |
| 21 | 1 |
| 23 | 1 |
| 25 | 3 |
| 26 | 1 |
Parts most often reported as the reports name them
Parts most reported, as a table
| reports | |
|---|---|
| Engine | 40 |
| Skin | 17 |
| Adapter | 13 |
| Rib | 12 |
| Control Cable | 11 |
| Fuel Control | 11 |
| Attach Fitting | 10 |
| Bearing | 10 |
| Bolt | 9 |
| Mount | 9 |
Latest reports
2026-09-16Fuel Line: kinked
2025-12-23Electrical Box: contaminated
2025-12-12Gasket: burned
2025-12-04Fire Detector: out of tolerance
2023-08-03Transducer: unknown
Approved replacement parts 21 parts manufacturer approvals
Parts a company other than the maker may make for this engine and sell as FAA-approved. The companies holding the most:
Qualiseal Technology 11Seal Dynamics INC 2Pratt & Whitney Engine Services INC (Formerly Altair) 2Ontic Engineering & Manufacturing INC 2Lamar Pma Corporation 2Honeywell International INC. 1Dedicated Packaging, LLC 1
Most often: balance weight (10), gasket (2), fuel pump (2), valve (1), trendcheck (1), spring (1), sealant (1), ring (1), fuel manifold (1), crosscheck monitoring (1).
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 10 with this engine series
- Air Tractor Inc AT-400 6 with this engine series
- Pilatus PC-6 6 with this engine series
- Dehavilland DHC-2 2 with this engine series
- Air Tractor Inc AT-402 1 with this engine series
- Dehavilland BEAVER DHC-2 MK.3 1 with this engine series
- Piper PA-46 Malibu, Mirage, Matrix and M-Class 1 with this engine series
Where they are
- Illinois 7 of these aircraft
- Montana 5 of these aircraft
- Texas 3 of these aircraft
- Alaska 3 of these aircraft
- Washington 2 of these aircraft
Biggest operators
- Woodley Aerial Leasing LLC 6 of these aircraft
- Wattum Investments LLC 2 of these aircraft
- Berry Aviation INC 2 of these aircraft
- Wells Fargo Trust CO Na Trustee 1 of these aircraft
Airworthiness
- Failure reports on the Pratt & Whitney PT6A-27 642 reports since 1995
Analytics
The whole map of how records connect · these connections as data: /graph/engine/pratt-whitney-pt6a-27.json.
Aircraft newest certificates first · 28
| Tail no. | Maker and model | Group | Owner and base | Certificate | Registered | Status |
|---|---|---|---|---|---|---|
| N105DE | Piper Aircraft Inc PA-46-701TP |
Fixed-wing, single engine | Globe Aero LLC Lakeland, Florida |
Standard | 2026-07-02 | ValidFAA registration status code V: Valid registration. All codes |
| N178GC | Dehavilland DHC-6-300 |
Fixed-wing, multi-engine | Rigidworks LLC Anaconda, Montana |
Standard | 2026-05-16 | ValidFAA registration status code V: Valid registration. All codes |
| N562CP | 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 |
| N9295 | Dehavilland DHC-6-300 |
Fixed-wing, multi-engine | Bank of Utah Trustee Salt Lake City, Utah |
Standard | 2025-10-09 | ValidFAA registration status code V: Valid registration. All codes |
| N62DB | Dehavilland DHC 2 MK III |
Fixed-wing, single engine | Wattum Investments LLC Kodiak, Alaska |
Standard | 2025-04-17 | ValidFAA registration status code V: Valid registration. All codes |
| N69359 | Dehavilland BEAVER DHC-2 MK.3 |
Fixed-wing, single engine | Red Leasing LLC Juneau, Alaska |
Standard | 2025-01-29 | ValidFAA registration status code V: Valid registration. All codes |
| N6WL | Pilatus PC-6/B2-H4 |
Fixed-wing, single engine | Aurora Air LLC Kalispell, Montana |
Standard | 2024-11-07 | ValidFAA registration status code V: Valid registration. All codes |
| N80LH | Pilatus PC-6/B2-H2 |
Fixed-wing, single engine | Lochsa Aviation LLC Missoula, Montana |
Standard | 2024-05-06 | ValidFAA registration status code V: Valid registration. All codes |
| N776PC | Pilatus PC-6/B2-H2 |
Fixed-wing, single engine | Technical Applications & Consulting LLC Topeka, Kansas |
Standard | 2024-02-25 | ValidFAA registration status code V: Valid registration. All codes |
| N994AH | Beech A99 |
Fixed-wing, multi-engine | Aerospace Asset Holdings LLC Wilmington, Delaware |
Standard | 2023-12-05 | ValidFAA registration status code V: Valid registration. All codes |
| N692AR | Dehavilland DHC-6-300 |
Fixed-wing, multi-engine | N692Ar LLC Kalispell, Montana |
Restricted | 2023-11-01 | ValidFAA registration status code V: Valid registration. All codes |
| N662AV | Dehavilland DHC-6-300 |
Fixed-wing, multi-engine | Berry Aviation INC San Marcos, Texas |
Standard | 2023-06-12 | ValidFAA registration status code V: Valid registration. All codes |
| N156PC | Pilatus PC-6/B2-H2 |
Fixed-wing, single engine | Idaho Skyworks LLC Walnut Creek, California |
Standard | 2021-04-17 | ValidFAA registration status code V: Valid registration. All codes |
| N96JC | Pilatus Aircraft Ltd PC-6/B2-H4 |
Fixed-wing, single engine | Adonai International Ministries Marine, Illinois |
Standard | 2020-04-06 | ValidFAA registration status code V: Valid registration. All codes |
| N4532F | Air Tractor Inc AT-402 |
Fixed-wing, single engine | Woodley Aerial Leasing LLC Walnut, Illinois |
Restricted | 2018-06-11 | ValidFAA registration status code V: Valid registration. All codes |
| N241SA | Dehavilland DHC-6-300 |
Fixed-wing, multi-engine | Diamond Bar LLC Kirkland, Washington |
Standard | 2016-09-23 | ValidFAA registration status code V: Valid registration. All codes |
| N418AV | Dehavilland DHC-6-300 |
Fixed-wing, multi-engine | Wells Fargo Trust CO Na Trustee Columbia, Maryland |
Standard | 2016-06-07 | ValidFAA registration status code V: Valid registration. All codes |
| N907KW | Dehavilland DHC 2 MK III |
Fixed-wing, single engine | Wattum Investments LLC Kodiak, Alaska |
Standard | 2016-05-09 | ValidFAA registration status code V: Valid registration. All codes |
| N3657T | Air Tractor Inc AT-400A |
Fixed-wing, single engine | Central Planes Aviation INC Sauk Centre, Minnesota |
Restricted | 2014-06-10 | ValidFAA registration status code V: Valid registration. All codes |
| N23416 | Air Tractor Inc AT-400A |
Fixed-wing, single engine | Woodley Aerial Leasing LLC Walnut, Illinois |
Restricted | 2014-03-27 | ValidFAA registration status code V: Valid registration. All codes |
| N73085 | Air Tractor Inc AT-400A |
Fixed-wing, single engine | Woodley Aerial Leasing LLC Walnut, Illinois |
Restricted | 2013-11-20 | ValidFAA registration status code V: Valid registration. All codes |
| N675BA | Dehavilland DHC-6-300 |
Fixed-wing, multi-engine | Berry Aviation INC San Marcos, Texas |
Standard | 2013-09-26 | ValidFAA registration status code V: Valid registration. All codes |
| N3160X | Air Tractor Inc AT-400A |
Fixed-wing, single engine | Woodley Aerial Leasing LLC Walnut, Illinois |
Restricted | 2013-07-18 | ValidFAA registration status code V: Valid registration. All codes |
| N8791S | Air Tractor Inc AT-400A |
Fixed-wing, single engine | Woodley Aerial Leasing LLC Walnut, Illinois |
Restricted | 2013-07-15 | ValidFAA registration status code V: Valid registration. All codes |
| N8907S | 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 |
| N633AR | Dehavilland DHC-6-300 |
Fixed-wing, multi-engine | Twin Otter Support Services LLC Las Vegas, Nevada |
Multiple | 2011-05-05 | ValidFAA registration status code V: Valid registration. All codes |
| N469TS | Dehavilland DHC-6-200 |
Fixed-wing, multi-engine | Desert Sand Aircraft Leasing CO INC Rosharon, Texas |
Standard | 2008-07-28 | ValidFAA registration status code V: Valid registration. All codes |
| N93JJ | Pilatus PC-6/B2-H4 |
Fixed-wing, single engine | Avstar INC Seattle, Washington |
Standard | 2007-03-21 | 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 12, 2026. Horsepower and thrust are the FAA's figures for the series, not for a particular aircraft.