Pratt & Whitney PT6A series
2,219 aircraft on the U.S. register carry a Pratt & Whitney PT6A series engine, rated at about 750 horsepower. The Cessna 208 Caravan is the model most often fitted with it (399 aircraft). The aircraft carrying it were built between 1961 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 series (2 codes). FAA spellings: PT6A SER · PT6A SERIES.
Fitted to model families
Cessna 208 Caravan · Beechcraft C90 King Air C90 · Air Tractor Inc AT-502 · Piper PA-46 Malibu, Mirage, Matrix and M-Class · Beechcraft B200 King Air B200 · Beechcraft B300 King Air 350 · Air Tractor Inc AT-402 · Daher (Socata) TBM-700 TBM 700 through TBM 960 · Pilatus PC-12 · Air Tractor Inc AT-802
Where they are owner's state
Kind of aircraft
When the aircraft were built by decade
What the FAA has certified, ordered and been told about the Pratt & Whitney PT6A series the component layer
No FAA order in the current files names this engine series. Operators and repair shops have filed 8,206 failure reports with the FAA since 1995, 343 of them in the last ten years.
Failure reports 8,206 since · what operators and shops told the FAA
Parts most often reported as the reports name them
Latest reports
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
- Cessna 208 Caravan 399 with this engine series
- Beechcraft C90 King Air C90 191 with this engine series
- Air Tractor Inc AT-502 188 with this engine series
- Piper PA-46 Malibu, Mirage, Matrix and M-Class 186 with this engine series
- Beechcraft B200 King Air B200 151 with this engine series
- Beechcraft B300 King Air 350 121 with this engine series
- Air Tractor Inc AT-402 94 with this engine series
- Daher (Socata) TBM-700 TBM 700 through TBM 960 93 with this engine series
- Texas 228 of these aircraft
- Tennessee 218 of these aircraft
- California 142 of these aircraft
- Florida 135 of these aircraft
- Delaware 108 of these aircraft
- Federal Express Corporation 134 of these aircraft
- Federal Express CORP 49 of these aircraft
- Alpine Aviation INC 31 of these aircraft
- Guardian Flight LLC 23 of these aircraft
- Dynamic Avlease INC 23 of these aircraft
- Failure reports on the Pratt & Whitney PT6A series 8,206 reports since 1995
These connections as data: /graph/engine/pratt-whitney-pt6a-series.json · about the eFlight graph.
Aircraft newest certificates first · 2,219
| Tail no. | Maker and model | Group | Owner and base | Certificate | Registered | Status |
|---|---|---|---|---|---|---|
| N13GX | Epic Aircraft Llc E1000 |
Fixed-wing, single engine | Epic II LLC Reno, Nevada |
Standard | 2025-04-14 | ValidFAA registration status code V: Valid registration. All codes |
| N404DP | Beech 200 |
Fixed-wing, multi-engine | Valie Air LLC Statesboro, Georgia |
Standard | 2025-04-07 | ValidFAA registration status code V: Valid registration. All codes |
| N4528L | Air Tractor Inc AT-402A |
Fixed-wing, single engine | Skyworks Aviation LLC Waynesboro, Georgia |
Restricted | 2025-04-07 | ValidFAA registration status code V: Valid registration. All codes |
| N6132W | Air Tractor Inc AT-502B |
Fixed-wing, single engine | West Hills Aviation INC DBA Huron, California |
Restricted | 2025-04-07 | ValidFAA registration status code V: Valid registration. All codes |
| N6170X | Air Tractor Inc AT-502B |
Fixed-wing, single engine | West Hills Aviation INC Huron, California |
Restricted | 2025-04-07 | ValidFAA registration status code V: Valid registration. All codes |
| N95GA | Beech B200 |
Fixed-wing, multi-engine | Drco Aviation LLC Matthews, Missouri |
Standard | 2025-04-07 | ValidFAA registration status code V: Valid registration. All codes |
| N1NG | Pilatus PC-7 |
Fixed-wing, single engine | Lewis Aeronautical LLC San Antonio, Texas |
Standard | 2025-04-03 | ValidFAA registration status code V: Valid registration. All codes |
| N4174V | Piper PA46-500TP |
Fixed-wing, single engine | Dalmore Estates LLC Los Angeles, California |
Standard | 2025-04-03 | ValidFAA registration status code V: Valid registration. All codes |
| N9187Z | Air Tractor Inc AT-502 |
Fixed-wing, single engine | Eagle LLC Sleepy Eye, Minnesota |
Restricted | 2025-04-03 | ValidFAA registration status code V: Valid registration. All codes |
| N803JA | Cessna 208 |
Fixed-wing, single engine | Caravan Flight Services LLC Bayside, New York |
Standard | 2025-04-02 | ValidFAA registration status code V: Valid registration. All codes |
| N769JS | Socata TBM 700 |
Fixed-wing, single engine | Individual owner Oregon |
Standard | 2025-04-01 | ValidFAA registration status code V: Valid registration. All codes |
| N166CL | Raytheon Aircraft Company B300 |
Fixed-wing, multi-engine | Ka Partners LLC Thomson, Georgia |
Standard | 2025-03-31 | ValidFAA registration status code V: Valid registration. All codes |
| N350CF | Beech B300 |
Fixed-wing, multi-engine | Clemens Aviation LLC Wichita, Kansas |
Standard | 2025-03-31 | ValidFAA registration status code V: Valid registration. All codes |
| N9091U | Air Tractor Inc AT-402A |
Fixed-wing, single engine | Meadow Creek Aerial Application INC Kelliher, Minnesota |
Restricted | 2025-03-29 | ValidFAA registration status code V: Valid registration. All codes |
| N9655B | Cessna 208B |
Fixed-wing, single engine | Skysno Aviation LLC Snohomish, Washington |
Standard | 2025-03-25 | ValidFAA registration status code V: Valid registration. All codes |
| N208NR | Cessna 208B |
Fixed-wing, single engine | Nv5 Geospatial INC Sheboygan Falls, Wisconsin |
Standard | 2025-03-20 | ValidFAA registration status code V: Valid registration. All codes |
| N222PV | Beech B300 |
Fixed-wing, multi-engine | J Turbines INC Wilmington, Delaware |
Standard | 2025-03-20 | ValidFAA registration status code V: Valid registration. All codes |
| N40310 | Thrush Aircraft Inc S2RHG-T65 |
Fixed-wing, single engine | Sugair LLC Corpus Christi, Texas |
Restricted | 2025-03-20 | ValidFAA registration status code V: Valid registration. All codes |
| N45FL | Beech 2000 |
Fixed-wing, multi-engine | Standard | 2025-03-20 | ValidFAA registration status code V: Valid registration. All codes | |
| N704MD | Cessna 208B |
Fixed-wing, single engine | Nv5 Geospatial INC Sheboygan Falls, Wisconsin |
Standard | 2025-03-20 | ValidFAA registration status code V: Valid registration. All codes |
| N2067B | Ayres Corporation S2R-T34 |
Fixed-wing, single engine | Agricair Leasing LLC Bancroft, Wisconsin |
Restricted | 2025-03-19 | ValidFAA registration status code V: Valid registration. All codes |
| N502JA | Air Tractor Inc AT-502 |
Fixed-wing, single engine | Hoppe Air LLC Beaman, Iowa |
Restricted | 2025-03-19 | ValidFAA registration status code V: Valid registration. All codes |
| N255DW | Piper PA46-500TP |
Fixed-wing, single engine | Hales Gutter Guys LLC Sedona, Arizona |
Standard | 2025-03-18 | ValidFAA registration status code V: Valid registration. All codes |
| N402TM | Air Tractor Inc AT-402B |
Fixed-wing, single engine | 402Wd Holdings LLC Corpus Christi, Texas |
Restricted | 2025-03-18 | ValidFAA registration status code V: Valid registration. All codes |
| N406CD | Piper PA46-500TP |
Fixed-wing, single engine | Gold Sky LLC Albuquerque, New Mexico |
Standard | 2025-03-18 | ValidFAA registration status code V: Valid registration. All codes |
| N9094T | Air Tractor Inc AT-502B |
Fixed-wing, single engine | Acadian Dusters LLC Church Point, Louisiana |
Restricted | 2025-03-14 | ValidFAA registration status code V: Valid registration. All codes |
| N425WD | Cessna 425 |
Fixed-wing, multi-engine | Standard | 2025-03-13 | ValidFAA registration status code V: Valid registration. All codes | |
| N55ZR | Raytheon Aircraft Company C90A |
Fixed-wing, multi-engine | Euroaviaition INC Trustee Kematen, |
Standard | 2025-03-12 | ValidFAA registration status code V: Valid registration. All codes |
| N362JB | Piper PA46-500TP |
Fixed-wing, single engine | Central Virginia Aviation INC Petersburg, Virginia |
Standard | 2025-03-11 | ValidFAA registration status code V: Valid registration. All codes |
| N87699 | Beech B200 |
Fixed-wing, multi-engine | Pjh Consulting LLC Reno, Nevada |
Standard | 2025-03-05 | ValidFAA registration status code V: Valid registration. All codes |
| N711PM | Socata TBM 700 |
Fixed-wing, single engine | Vinton Aero LLC Cedar Springs, Michigan |
Standard | 2025-03-02 | ValidFAA registration status code V: Valid registration. All codes |
| N171S | Mark Rock EVOLUTION |
Fixed-wing, single engine | Cotterkey N171S LLC Phoenix, Arizona |
Experimental | 2025-02-25 | ValidFAA registration status code V: Valid registration. All codes |
| N5003C | Air Tractor Inc AT-502B |
Fixed-wing, single engine | Crop Air LLC Eaton, Colorado |
Restricted | 2025-02-25 | ValidFAA registration status code V: Valid registration. All codes |
| N700LX | Raytheon Aircraft Company B200 |
Fixed-wing, multi-engine | Limpia Logistics LLC Midland, Texas |
Standard | 2025-02-25 | ValidFAA registration status code V: Valid registration. All codes |
| N5034R | Air Tractor Inc AT-402B |
Fixed-wing, single engine | Mid Missouri Spray Service LLC Richmond, Missouri |
Restricted | 2025-02-24 | ValidFAA registration status code V: Valid registration. All codes |
| N506MV | Raytheon Aircraft Company B300 |
Fixed-wing, multi-engine | Firecracker Air LLC Missoula, Montana |
Standard | 2025-02-19 | ValidFAA registration status code V: Valid registration. All codes |
| N5075L | Air Tractor Inc AT-502B |
Fixed-wing, single engine | Aslesen Leasin LLC Halstad, Minnesota |
Restricted | 2025-02-19 | ValidFAA registration status code V: Valid registration. All codes |
| N8524H | Air Tractor Inc AT-802A |
Fixed-wing, single engine | Individual owner Texas |
Restricted | 2025-02-18 | ValidFAA registration status code V: Valid registration. All codes |
| N952PC | Epic Aircraft Llc E1000 |
Fixed-wing, single engine | Dmk Golf Design INC Bend, Oregon |
Standard | 2025-02-15 | ValidFAA registration status code V: Valid registration. All codes |
| N619TK | New Piper Aircraft Inc PA-46-500TP |
Fixed-wing, single engine | Withheld at owner's request | Standard | 2025-02-11 | ValidFAA registration status code V: Valid registration. All codes |
| N88XJ | Raytheon Aircraft Company C90A |
Fixed-wing, multi-engine | N88Xj LLC Park Ridge, Illinois |
Standard | 2025-02-10 | ValidFAA registration status code V: Valid registration. All codes |
| N109MD | Beech B200 |
Fixed-wing, multi-engine | M B Duncan INC Bakersfield, California |
Standard | 2025-02-06 | ValidFAA registration status code V: Valid registration. All codes |
| N548MB | Pilatus PC-7 |
Fixed-wing, single engine | Individual owner Oregon |
Experimental | 2025-02-06 | ValidFAA registration status code V: Valid registration. All codes |
| N660MC | Thrush Aircraft Llc S2R-T660 |
Fixed-wing, single engine | Mcguires Flying Service LLC Obion, Tennessee |
Restricted | 2025-02-06 | ValidFAA registration status code V: Valid registration. All codes |
| N411JP | Piper PA-46-600TP |
Fixed-wing, single engine | Bluffside Aero LLC Williamsburg, Virginia |
Standard | 2025-02-04 | ValidFAA registration status code V: Valid registration. All codes |
| N820GM | Piper Aircraft Inc PA-46-701TP |
Fixed-wing, single engine | Second Wind LLC Tallahassee, Florida |
Standard | 2025-02-04 | ValidFAA registration status code V: Valid registration. All codes |
| N984MA | Beech C90 |
Fixed-wing, multi-engine | Extraordinary Air LLC Greenville, South Carolina |
Standard | 2025-01-29 | ValidFAA registration status code V: Valid registration. All codes |
| N621GZ | Raytheon Aircraft Company B300 |
Fixed-wing, multi-engine | Hfjw Properties Leasing LLC Santa Rosa Beach, Florida |
Standard | 2025-01-27 | ValidFAA registration status code V: Valid registration. All codes |
| N896CM | Beech 200 |
Fixed-wing, multi-engine | Xrp Investments LLC Clyde, Michigan |
Standard | 2025-01-27 | ValidFAA registration status code V: Valid registration. All codes |
| N982GA | Beech 200 |
Fixed-wing, multi-engine | Madaket Atlas LLC Nantucket, Massachusetts |
Standard | 2025-01-23 | ValidFAA registration status code V: Valid registration. All codes |
| N417KC | Pilatus PC-12/45 |
Fixed-wing, single engine | Co-owned owner Florida |
Standard | 2025-01-22 | ValidFAA registration status code V: Valid registration. All codes |
| N283PM | Cessna 208B |
Fixed-wing, single engine | Planemasters LTD West Chicago, Illinois |
Standard | 2025-01-15 | ValidFAA registration status code V: Valid registration. All codes |
| N909P | Piper PA46-500TP |
Fixed-wing, single engine | Atlas Property Management LLC Broken Arrow, Oklahoma |
Standard | 2025-01-13 | ValidFAA registration status code V: Valid registration. All codes |
| N388TW | Piper PA46-500TP |
Fixed-wing, single engine | Tl Lobo Group LLC Rockwall, Texas |
Standard | 2025-01-08 | ValidFAA registration status code V: Valid registration. All codes |
| N61257 | Air Tractor Inc AT-502B |
Fixed-wing, single engine | T&T Highcountry Flying Service LLC Saint Anthony, Idaho |
Restricted | 2025-01-07 | ValidFAA registration status code V: Valid registration. All codes |
| N411R | New Piper Aircraft Inc PA-46-500TP |
Fixed-wing, single engine | Sm1019 LLC Polson, Montana |
Standard | 2025-01-06 | ValidFAA registration status code V: Valid registration. All codes |
| N135LT | Hill George Melvin LANCAIR IV P |
Fixed-wing, single engine | Individual owner Illinois |
Experimental | 2024-12-30 | ValidFAA registration status code V: Valid registration. All codes |
| N103LA | Air Tractor Inc AT-402A |
Fixed-wing, single engine | Love Aero LLC Leland, Mississippi |
Restricted | 2024-12-16 | ValidFAA registration status code V: Valid registration. All codes |
| N861PP | Pilatus PC-12/45 |
Fixed-wing, single engine | Irlbeckbruch Plane LLC York, Nebraska |
Standard | 2024-12-12 | ValidFAA registration status code V: Valid registration. All codes |
| N381MQ | Short Bros SD3-60 |
Fixed-wing, multi-engine | Acc Integrated Services INC Milwaukee, Wisconsin |
Standard | 2024-12-11 | ValidFAA registration status code V: Valid registration. All codes |
| N382MQ | Short Bros SD3-60 |
Fixed-wing, multi-engine | Acc Integrated Services INC Milwaukee, Wisconsin |
Standard | 2024-12-11 | ValidFAA registration status code V: Valid registration. All codes |
| N6VA | Piper PA-46-600TP |
Fixed-wing, single engine | Midstates Aircraft Leasing LLC Bern, Kansas |
Standard | 2024-12-10 | ValidFAA registration status code V: Valid registration. All codes |
| N9006Q | Air Tractor Inc AT-502A |
Fixed-wing, single engine | Crider Flying Service Swifton, Arkansas |
Restricted | 2024-12-09 | ValidFAA registration status code V: Valid registration. All codes |
| N111MQ | Raytheon Aircraft Company B200 |
Fixed-wing, multi-engine | Bismarck Air Medical LLC Bismarck, North Dakota |
Standard | 2024-12-07 | ValidFAA registration status code V: Valid registration. All codes |
| N769FX | Textron Aviation Inc 408 |
Fixed-wing, multi-engine | Federal Express CORP Memphis, Tennessee |
Standard | 2024-12-06 | ValidFAA registration status code V: Valid registration. All codes |
| N455RS | Piper PA46-500TP |
Fixed-wing, single engine | Tfr INC Steamboat Springs, Colorado |
Standard | 2024-12-04 | ValidFAA registration status code V: Valid registration. All codes |
| N701CN | Socata TBM 700 |
Fixed-wing, single engine | Scouts Rest Ranch LLC Darby, Montana |
Standard | 2024-11-27 | ValidFAA registration status code V: Valid registration. All codes |
| N9GA | Raytheon Aircraft Company B200 |
Fixed-wing, multi-engine | N9Ga Leasing LLC Ponca City, Oklahoma |
Standard | 2024-11-26 | ValidFAA registration status code V: Valid registration. All codes |
| N197WA | Beech 99A |
Fixed-wing, multi-engine | Ameriflight LLC Dallas, Texas |
Standard | 2024-11-21 | ValidFAA registration status code V: Valid registration. All codes |
| N55WF | Beech C90 |
Fixed-wing, multi-engine | Icm INC Colwich, Kansas |
Standard | 2024-11-21 | ValidFAA registration status code V: Valid registration. All codes |
| N191WA | Beech 99 |
Fixed-wing, multi-engine | Ameriflight LLC Dallas, Texas |
Standard | 2024-11-19 | ValidFAA registration status code V: Valid registration. All codes |
| N83GT | Piper PA46-500TP |
Fixed-wing, single engine | Chambliss Aerobatics LLC Chandler, Arizona |
Standard | 2024-11-19 | ValidFAA registration status code V: Valid registration. All codes |
| N861MA | Cessna 208B |
Fixed-wing, single engine | Aerodynamics Worldwide INC Wilmington, Delaware |
Standard | 2024-11-18 | ValidFAA registration status code V: Valid registration. All codes |
| N152AL | Piper PA46-500TP |
Fixed-wing, single engine | N152Al LLC Tulsa, Oklahoma |
Standard | 2024-11-15 | ValidFAA registration status code V: Valid registration. All codes |
| N10DH | Beech F90 |
Fixed-wing, multi-engine | Vta Capital LLC Ontario, California |
Standard | 2024-11-14 | ValidFAA registration status code V: Valid registration. All codes |
| N841KY | Beech 200 |
Fixed-wing, multi-engine | Co-owned owner Tennessee |
Standard | 2024-10-31 | ValidFAA registration status code V: Valid registration. All codes |
| N565C | Piper PA46-500TP |
Fixed-wing, single engine | Individual owner North Carolina |
Standard | 2024-10-30 | ValidFAA registration status code V: Valid registration. All codes |
| N350TF | Raytheon Aircraft Company B300 |
Fixed-wing, multi-engine | Lamb Aviation LLC Perris, California |
Standard | 2024-10-26 | ValidFAA registration status code V: Valid registration. All codes |
| N732MD | Cessna 208B |
Fixed-wing, single engine | Umb Bank Na Trustee Salt Lake City, Utah |
Standard | 2024-10-24 | ValidFAA registration status code V: Valid registration. All codes |
| N272GX | Epic Aircraft Llc E1000 |
Fixed-wing, single engine | Freedom Aviation LLC Anaconda, Montana |
Standard | 2024-10-17 | ValidFAA registration status code V: Valid registration. All codes |
| N39GK | Piaggio P180 |
Fixed-wing, multi-engine | Business & Pleasure Air Charter LLC Bakersfield, California |
Standard | 2024-10-16 | ValidFAA registration status code V: Valid registration. All codes |
| N285RB | Raytheon Aircraft Company B300 |
Fixed-wing, multi-engine | Butler National INC New Century, Kansas |
Standard | 2024-10-15 | ValidFAA registration status code V: Valid registration. All codes |
| N488XJ | Raytheon Aircraft Company C90A |
Fixed-wing, multi-engine | Co-owned owner Texas |
Standard | 2024-10-15 | ValidFAA registration status code V: Valid registration. All codes |
| N129TP | Pilatus Aircraft Ltd PC-12/45 |
Fixed-wing, single engine | Co-owned owner Texas |
Standard | 2024-10-10 | ValidFAA registration status code V: Valid registration. All codes |
| N425LC | Cessna 425 |
Fixed-wing, multi-engine | Glyde Aviation LLC Canton, Massachusetts |
Standard | 2024-10-09 | ValidFAA registration status code V: Valid registration. All codes |
| N500EQ | Beech C90 |
Fixed-wing, multi-engine | Txsd Holdings LLC Amarillo, Texas |
Standard | 2024-10-09 | ValidFAA registration status code V: Valid registration. All codes |
| N90ZZ | Piper PA46-500TP |
Fixed-wing, single engine | Co-owned owner Michigan |
Standard | 2024-10-08 | ValidFAA registration status code V: Valid registration. All codes |
| N80TM | Scott Macwilliam SR3500 MOOSE |
Fixed-wing, single engine | Rad Holding I LLC Olympia, Washington |
Experimental | 2024-10-07 | ValidFAA registration status code V: Valid registration. All codes |
| N14GV | Piper PA46-500TP |
Fixed-wing, single engine | Scott T LLC Portland, Oregon |
Standard | 2024-09-28 | ValidFAA registration status code V: Valid registration. All codes |
| N900HS | Pilatus Aircraft Ltd PC-12 |
Fixed-wing, single engine | Bizair LLC Wilmington, Delaware |
Standard | 2024-09-21 | ValidFAA registration status code V: Valid registration. All codes |
| N23951 | Air Tractor Inc AT-400A |
Fixed-wing, single engine | Rowland Dusters LLC Raymondville, Texas |
Restricted | 2024-09-19 | ValidFAA registration status code V: Valid registration. All codes |
| N5066C | Air Tractor Inc AT-802A |
Fixed-wing, single engine | Farm AG Enterprises LLC Buckeye, Arizona |
Restricted | 2024-09-11 | ValidFAA registration status code V: Valid registration. All codes |
| N917TP | Piper PA-31T1 |
Fixed-wing, multi-engine | Aerial LLC Kalispell, Montana |
Standard | 2024-09-10 | ValidFAA registration status code V: Valid registration. All codes |
| N75LW | Beech E-90 |
Fixed-wing, multi-engine | 4T Aviation LLC Maypearl, Texas |
Standard | 2024-09-04 | ValidFAA registration status code V: Valid registration. All codes |
| N190WA | Beech C-99 |
Fixed-wing, multi-engine | Ameriflight LLC Dallas, Texas |
Standard | 2024-08-31 | ValidFAA registration status code V: Valid registration. All codes |
| N220UM | Piper PA46-500TP |
Fixed-wing, single engine | 3K Aviation LLC Birmingham, Michigan |
Standard | 2024-08-27 | ValidFAA registration status code V: Valid registration. All codes |
| N353KM | Pilatus PC-12/45 |
Fixed-wing, single engine | Papareenie LLC Pismo Beach, California |
Standard | 2024-08-27 | ValidFAA registration status code V: Valid registration. All codes |
| N576DD | Piper Aircraft Inc PA-46-600TP |
Fixed-wing, single engine | Up Aero LLC Williamsburg, Ohio |
Standard | 2024-08-22 | ValidFAA registration status code V: Valid registration. All codes |
| N5197X | Air Tractor Inc AT-502B |
Fixed-wing, single engine | Juliet Alpha Sierra LLC Sartell, Minnesota |
Restricted | 2024-08-20 | ValidFAA registration status code V: Valid registration. All codes |
| N55WP | Pilatus Aircraft Ltd PC-12 |
Fixed-wing, single engine | Richardson Farms Outfitters INC Pittsfield, Illinois |
Standard | 2024-08-15 | 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.
