Engines · piston (reciprocating) · data as of October 5, 2026

Pratt & Whitney R1340 series

1,230 aircraft on the U.S. register carry a Pratt & Whitney R1340 series engine, rated at about 600 horsepower. The North American AT-6 Texan is the model most often fitted with it (183 aircraft). The aircraft carrying it were built between 1933 and 2022.

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 R1340 series. FAA spelling: R1340 SERIES.

Fitted to model families

North American AT-6 Texan183Grumman Acft Eng Cor-Schweizer G-164149North American SNJ-5 Texan (Navy)118North American T-6 Texan92Air Tractor Inc AT-30166Aero Commander S255Rockwell International S-254Air Tractor Inc AT-40152Ayres Corporation S-248Canadian Car & Foundry HARVARD MK IV43Schweizer Aircraft Corp G-16441North American SNJ-436

North American AT-6 Texan · Grumman Acft Eng Cor-Schweizer G-164 · North American SNJ-5 Texan (Navy) · North American T-6 Texan · Air Tractor Inc AT-301 · Aero Commander S2 · Rockwell International S-2 · Air Tractor Inc AT-401 · Ayres Corporation S-2 · Canadian Car & Foundry HARVARD MK IV

Where they are owner's state

California174Texas154Washington52North Dakota50Delaware46Minnesota43Nebraska39Florida36Colorado34Illinois33

Kind of aircraft

Piston singles1,136 (92%)Turboprops75 (6%)Piston twins17 (1%)Helicopters2 (0.2%)

When the aircraft were built by decade

What the FAA has certified, ordered and been told about the Pratt & Whitney R1340 series the component layer

No FAA order in the current files names this engine series. Operators and repair shops have filed 58 failure reports with the FAA since 1995, 15 of them in the last ten years.

Failure reports 58 since · what operators and shops told the FAA

Parts most often reported as the reports name them

Cylinder6Engine4Cylinder Head3Exhaust Valve3Nut3Attach Angle2Roller2Strut2Angle1Battery1

Latest reports

2018-08-02Throttle Arm: worn

2015-05-19Cam: worn

2014-08-24Cylinder: fractured

2014-07-28Engine: power loss

2013-04-24Bearing: failed

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

North American AT-6 Texan 183 with this engine series
Grumman Acft Eng Cor-Schweizer G-164 149 with this engine series
North American SNJ-5 Texan (Navy) 118 with this engine series
North American T-6 Texan 92 with this engine series
Air Tractor Inc AT-301 66 with this engine series
Aero Commander S2 55 with this engine series
Rockwell International S-2 54 with this engine series
Air Tractor Inc AT-401 52 with this engine series

Where they are

California 174 of these aircraft
Texas 154 of these aircraft
Washington 52 of these aircraft
North Dakota 50 of these aircraft
Delaware 46 of these aircraft

Biggest operators

Hershey Flying Service INC 11 of these aircraft
American Airpower Heritage Flying Museum 10 of these aircraft
Mid Continent Aircraft CORP 8 of these aircraft
Johnson Airspray INC 8 of these aircraft
American Airpower Heritage Flying Museum INC 8 of these aircraft

Airworthiness

Failure reports on the Pratt & Whitney R1340 series 58 reports since 1995

Analytics

These connections as data: /graph/engine/pratt-whitney-r1340-series.json · about the eFlight graph.

Aircraft newest certificates first · 1,230

Tail no.	Maker and model	Group	Owner and base	Certificate	Registered	Status
N3158W	North American AT-6C	Fixed-wing, single engine	N3158W LLC Mesa, Arizona	Standard	2019-01-09	Valid
N5WS	North American/Walker/Screws AT6C	Fixed-wing, single engine	Individual owner Oklahoma	Standard	2018-12-31	Valid
N3104G	Ayres Corporation S2R-R1340	Fixed-wing, single engine	Becker Flying Service INC Hartington, Nebraska	Restricted	2018-12-21	Valid
N43884	North American AT-6D	Fixed-wing, single engine	Air Cav Helicopters LLC Wilmington, Delaware	Standard	2018-12-15	Valid
N4001T	Ayres Corporation S2R-600	Fixed-wing, single engine	Larson AG INC Stephen, Minnesota	Restricted	2018-11-29	Valid
N8943H	Grumman Acft Eng Cor-Schweizer G-164A	Fixed-wing, single engine	Yaggie Farm Service INC Breckenridge, Minnesota	Restricted	2018-10-26	Valid
N411H	Aero Commander 600 S-2D	Fixed-wing, single engine	Cruce Aviation LLC - Series Leasing Marquette Heights, Illinois	Restricted	2018-10-25	Valid
N799MU	North American T-6G	Fixed-wing, single engine	Warbirds 3 LLC Kalispell, Montana	Standard	2018-10-25	Valid
N220SL	North American T-6G	Fixed-wing, single engine	Individual owner Illinois	Standard	2018-10-17	Valid
N8701V	Aero Commander 600 S-2D	Fixed-wing, single engine	Individual owner Illinois	Restricted	2018-09-15	Valid
N24HG	Canadian Car & Foundry HARVARD MK IV	Fixed-wing, single engine	Individual owner Oregon	Experimental	2018-09-08	Valid
N31691	Air Tractor Inc AT-301	Fixed-wing, single engine	Individual owner North Carolina	Restricted	2018-09-04	Valid
N42GK	North American AT-6D	Fixed-wing, single engine	Upupa Epops INC Wilmington, Delaware	Standard	2018-08-30	Valid
N1364J	North American T-6G	Fixed-wing, single engine	Snj-2 CORP Farmingdale, New York	Standard	2018-08-27	Valid
N417AS	North American AT-6C	Fixed-wing, single engine	Individual owner Washington	Standard	2018-08-25	Valid
N6432D	North American AT-6D	Fixed-wing, single engine	Kaa CORP Chino, California	Standard	2018-08-18	Valid
N8FD	North American AT-6G	Fixed-wing, single engine	Brookway Aviation LLC Brookhaven, Mississippi	Standard	2018-08-18	Valid
N3644F	North American SNJ-5	Fixed-wing, single engine	Snj5B LLC Reno, Nevada	Standard	2018-07-24	Valid
N415NJ	North American SNJ-2	Fixed-wing, single engine	Warlords INC Pittsfield, New Hampshire	Standard	2018-07-11	Valid
N44757	Naval Aircraft Factory N3N-3	Fixed-wing, single engine	Individual owner California	Restricted	2018-06-28	Valid
N6171A	North American SNJ-4	Fixed-wing, single engine	Lt Development Group LLC Watford City, North Dakota	Standard	2018-06-28	Valid
N9272K	North American AT-6D	Fixed-wing, single engine	Lt Development Group LLC Watford City, North Dakota	Standard	2018-06-28	Valid
N918AT	North American T-6G	Fixed-wing, single engine	Bumble Bee Air INC Menlo Park, California	Standard	2018-06-18	Valid
N3715G	North American AT-6G	Fixed-wing, single engine	510T6 LLC Morrison, Colorado	Standard	2018-06-11	Valid
N7407C	North American-Banaire Entprs. SNJ-4	Fixed-wing, single engine	Huff Air LLC Uvalde, Texas	Standard	2018-06-01	Valid
N7861B	North American SNJ-5	Fixed-wing, single engine	Plane Crazy Aviation LLC Fargo, North Dakota	Standard	2018-05-24	Valid
N7309D	Air Tractor Inc AT-301	Fixed-wing, single engine	Farm Air INC Astoria, Illinois	Restricted	2018-05-16	Valid
N59378	Boeing A75N1(PT17)	Fixed-wing, single engine	American Airpower Heritage Flying Museum INC Dallas, Texas	Standard	2018-05-07	Valid
N7231G	North American AT-6D	Fixed-wing, single engine	Individual owner Florida	Standard	2018-04-27	Valid
N7460C	North American AT-6F	Fixed-wing, single engine	Mile High Aviation Group LLC Port Orange, Florida	Standard	2018-04-17	Valid
N465SH	North American AT-6C	Fixed-wing, single engine	Hahns Aircraft CO INC La Salle, Illinois	Experimental	2018-04-16	Valid
N51979	North American SNJ-5	Fixed-wing, single engine	Up North LLC Wilmington, Delaware	Standard	2018-04-12	Valid
N6760K	Grumman Acft Eng Cor-Schweizer G-164B	Fixed-wing, single engine	Wells AG Aviation LLC Saint Paul, Nebraska	Restricted	2018-04-04	Valid
N45WA	North American SNJ-4	Fixed-wing, single engine	North American Warbirds INC Wilmington, Delaware	Standard	2018-03-22	Valid
N7496K	Grumman Acft Eng Cor-Schweizer G-164A	Fixed-wing, single engine	AG Aviation INC Welsh, Louisiana	Restricted	2018-03-22	Valid
N60057	Air Tractor Inc AT-401	Fixed-wing, single engine	Sunflower Aero INC Atwood, Kansas	Restricted	2018-03-21	Valid
N5083	Grumman Acft Eng Cor-Schweizer G-164A	Fixed-wing, single engine	Individual owner Texas	Restricted	2018-03-20	Valid
N350HT	North American AT-6D	Fixed-wing, single engine	Woelbing Aviation LLC Franksville, Wisconsin	Standard	2018-03-14	Valid
N424DM	North American HARVARD MKII	Fixed-wing, single engine	National Wings and Armor Foundation Battle Ground, Washington	Experimental	2018-03-13	Valid
N6976K	Grumman Acft Eng Cor-Schweizer G-164C	Fixed-wing, single engine	Donovan Steve S Herington, Kansas	Restricted	2018-02-13	Valid
N7306L	Air Tractor Inc AT-301	Fixed-wing, single engine	Individual owner Montana	Restricted	2018-02-12	Valid
N56CU	North American/Victoria Mnt Lt AT-6A	Fixed-wing, single engine	Individual owner North Carolina	Standard	2018-02-05	Valid
N2237Z	Ayres Corporation S-2R	Fixed-wing, single engine	Flying G Aviation INC Drayton, North Dakota	Restricted	2018-01-25	Valid
N662DB	Canadian Car & Foundry HARVARD MK IV	Fixed-wing, single engine	Aircraft Guaranty CORP Trustee Oklahoma City, Oklahoma	Experimental	2018-01-12	Valid
N2314Q	Air Tractor Inc AT-301	Fixed-wing, single engine	Pitt and Pitt Aviation Wapato, Washington	Restricted	2018-01-10	Valid
N51903	North American SNJ-5	Fixed-wing, single engine	Warbird Leasing LLC Santa Fe, New Mexico	Standard	2018-01-09	Valid
N3173G	North American AT-6G	Fixed-wing, single engine	Finger 4 Flight LLC Fredericksburg, Virginia	Standard	2018-01-08	Valid
N2806G	North American AT-6G	Fixed-wing, single engine	Southern Airmotive INC Texico, New Mexico	Restricted	2018-01-02	Valid
N832AJ	North American/Victoria Mnt Lt AT-6A	Fixed-wing, single engine	Individual owner Virginia	Standard	2017-12-28	Valid
N969RH	North American SNJ-6	Fixed-wing, single engine	Co-owned owner Idaho	Standard	2017-12-21	Valid
N9179A	Air Tractor Inc AT-401	Fixed-wing, single engine	Frontier Agricultural Services INC Calexico, California	Restricted	2017-12-14	Valid
N9060Z	North American SNJ-5	Fixed-wing, single engine	Individual owner California	Standard	2017-12-08	Valid
N3753G	North American T-6G	Fixed-wing, single engine	Rickards Aviation Group LLC Millsboro, Delaware	Standard	2017-11-30	Valid
N1811B	North American HARVARD 4	Fixed-wing, single engine	Onaero INC Santa Monica, California	Experimental	2017-11-02	Valid
N3063Q	Aero Commander S2R	Fixed-wing, single engine	Precision AG Air LLC Pendleton, Indiana	Standard	2017-11-02	Valid
N48377	Grumman Acft Eng Cor-Schweizer G-164A	Fixed-wing, single engine	AG Spraying LLC Bonner Springs, Kansas	Restricted	2017-11-02	Valid
N972QC	Grumman Acft Eng Cor-Schweizer G-164A	Fixed-wing, single engine	Mark Gary Flying Service INC Inverness, Mississippi	Restricted	2017-11-01	Valid
N4914X	Rockwell International S-2R	Fixed-wing, single engine	Individual owner Colorado	Restricted	2017-10-18	Valid
N2550	North American SNJ-5	Fixed-wing, single engine	Vegas Warbirds LLC Las Vegas, Nevada	Standard	2017-10-06	Valid
N5006B	Air Tractor Inc AT-401B	Fixed-wing, single engine	Sky West Aviation INC Trustee Albuquerque, New Mexico	Restricted	2017-10-03	Valid
N41BT	North American SNJ-5	Fixed-wing, single engine	Individual owner Wyoming	Standard	2017-09-27	Valid
N722WB	North American T-6G	Fixed-wing, single engine	Individual owner California	Standard	2017-09-26	Valid
N26808	North American SNJ-4	Fixed-wing, single engine	Historic Wings LLC Whitehouse Station, New Jersey	Standard	2017-09-20	Valid
N555Q	North American AT-6G	Fixed-wing, single engine	Co-owned owner California	Standard	2017-09-12	Valid
N4154X	Rockwell International S-2R	Fixed-wing, single engine	Allied Sprayers INC Hawley, Texas	Restricted	2017-09-11	Valid
N8517V	Rockwell International S-2R	Fixed-wing, single engine	Sherman Aviation INC Redmond, Oregon	Restricted	2017-09-08	Valid
N522LU	North American AT-6G	Fixed-wing, single engine	Skyway INC Wilmington, Delaware	Standard	2017-08-29	Valid
N6571K	Grumman Acft Eng Cor-Schweizer G-164B	Fixed-wing, single engine	Aj Aviation LLC Gwinner, North Dakota	Restricted	2017-08-29	Valid
N75002	Schweizer Aircraft Corp G-164B	Fixed-wing, single engine	Weaver Flying Service INC Quincy, Washington	Restricted	2017-08-29	Valid
N8380K	Grumman Acft Eng Cor-Schweizer G-164B	Fixed-wing, single engine	Heimgartner Aviation LLC Juliaetta, Idaho	Restricted	2017-08-24	Valid
N7501K	Schweizer Aircraft Corp G-164B	Fixed-wing, single engine	Hershey Flying Service INC David City, Nebraska	Restricted	2017-08-15	Valid
N7296C	North American SNJ-5	Fixed-wing, single engine	Individual owner Arizona	Standard	2017-07-31	Valid
N55FW	North American SNJ-5	Fixed-wing, single engine	Riverbend Aviation LLC Hernando, Mississippi	Experimental	2017-07-21	Valid
N211RF	North American AT-6C	Fixed-wing, single engine	American Airpower Heritage Flying Museum Dallas, Texas	Standard	2017-07-20	Valid
N6253C	North American T-6G	Fixed-wing, single engine	American Airpower Heritage Flying Museum INC Dallas, Texas	Multiple	2017-07-18	Valid
N8841Q	Aero Commander S2R	Fixed-wing, single engine	Hawke AG Aviation Oakdale, California	Restricted	2017-07-03	Valid
N27817	North American AT-6G	Fixed-wing, single engine	Individual owner California	Standard	2017-06-28	Valid
N8080K	Gulfstream-Schweizer A/C Corp GULFSTREAM AM G-164B	Fixed-wing, single engine	Hershey Flying Service INC David City, Nebraska	Restricted	2017-06-22	Valid
N6832K	Grumman Acft Eng Cor-Schweizer G-164B	Fixed-wing, single engine	Hershey Flying Service INC David City, Nebraska	Restricted	2017-06-21	Valid
N7480	Grumman Acft Eng Cor-Schweizer G-164A	Fixed-wing, single engine	Hershey Flying Service INC David City, Nebraska	Restricted	2017-06-21	Valid
N7988C	North American AT-6D	Fixed-wing, single engine	Freppon Farm Equipment LLC Wilmington, Delaware	Standard	2017-06-13	Valid
N590WW	North American SNJ-5	Fixed-wing, single engine	Elliott Warbirds LLC Grand Coteau, Louisiana	Standard	2017-05-25	Valid
N5360N	Boeing 75	Fixed-wing, single engine	Flying Inn Dfw LLC Fort Worth, Texas	Restricted	2017-05-09	Valid
N8892Q	Aero Commander S2R	Fixed-wing, single engine	Frey Jerry P Fallon, Nevada	Restricted	2017-05-08	Valid
N23313	Air Tractor Inc AT-301	Fixed-wing, single engine	Thomas AG Aerial INC Thomas, Oklahoma	Restricted	2017-05-04	Valid
N8481K	Schweizer Aircraft Corp G-164B	Fixed-wing, single engine	Bowles Flying Service Live Oak, California	Restricted	2017-05-04	Valid
N3972E	North American SNJ-5	Fixed-wing, single engine	Plane Fun INC Tr Trustee Snellville, Georgia	Standard	2017-04-28	Valid
N6980C	North American AT-6D	Fixed-wing, single engine	Co-owned owner Nevada	Standard	2017-04-24	Valid
N3242G	North American AT-6D	Fixed-wing, single engine	American Airpower Heritage Flying Museum Dallas, Texas	Experimental	2017-04-21	Valid
N5380	Grumman Acft Eng Cor-Schweizer G-164A	Fixed-wing, single engine	Tall Towers Aviation INC Page, North Dakota	Restricted	2017-04-21	Valid
N6598K	Grumman Acft Eng Cor-Schweizer G-164B	Fixed-wing, single engine	Sky Tractor LLC Hillsboro, North Dakota	Restricted	2017-04-20	Valid
N4135A	North American SNJ-7	Fixed-wing, single engine	Individual owner Texas	Standard	2017-04-13	Valid
N5679X	Aero Commander S2R	Fixed-wing, single engine	Individual owner Texas	Restricted	2017-04-13	Valid
N8976Q	Aero Commander S2R	Fixed-wing, single engine	Wilde Air Service LLC Volga, South Dakota	Restricted	2017-03-30	Valid
N7976A	North American AT-6F	Fixed-wing, single engine	Witham Warbirds LLC Stuart, Florida	Standard	2017-03-28	Valid
N6900G	North American T-6G	Fixed-wing, single engine	Individual owner Iowa	Standard	2017-03-23	Valid
N73337	North American T-6	Fixed-wing, single engine	At-6G LLC Galena, Ohio	Standard	2017-03-16	Valid
N1037Z	Canadian Car & Foundry NORSEMAN MARK V	Fixed-wing, single engine	Individual owner Colorado	Standard	2017-03-03	Valid
N61853	Noorduyn UC-64A	Fixed-wing, single engine	Nbi LLC Boulder, Colorado	Standard	2017-02-09	Valid
N7492U	North American AT-6D	Fixed-wing, single engine	Flyimg Time LLC Jenks, Oklahoma	Standard	2017-01-31	Valid

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.