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
N373N	North American AT-6D	Fixed-wing, single engine	Individual owner Illinois	Standard	2020-10-16	Valid
N4708C	North American AT-6F	Fixed-wing, single engine	Parcell Robert A Justin, Texas	Restricted	2020-10-08	Valid
N101BW	North American AT-6F	Fixed-wing, single engine	Individual owner New Hampshire	Standard	2020-09-29	Valid
N49388	North American T-6G	Fixed-wing, single engine	Seaplane Adventures LLC Mill Valley, California	Standard	2020-09-29	Valid
N501BR	Air Tractor Inc AT-501	Fixed-wing, single engine	Johnson Airspray INC Argyle, Minnesota	Restricted	2020-09-25	Valid
N23219	Air Tractor Inc AT-301	Fixed-wing, single engine	Thiel Air Care INC Chowchilla, California	Restricted	2020-08-26	Valid
N7083C	North American SNJ-4	Fixed-wing, single engine	Gross Flying Service INC Larned, Kansas	Standard	2020-08-03	Valid
N48645	Schweizer Aircraft Corp G-164B	Fixed-wing, single engine	Buntings Aerial Applications LLC Berlin, Maryland	Restricted	2020-07-28	Valid
N5184V	North American T-6G	Fixed-wing, single engine	Co-owned owner Florida	Standard	2020-07-23	Valid
N19086	Canadian Car & Foundry HARVARD MK IV	Fixed-wing, single engine	Individual owner Washington	Experimental	2020-07-21	Valid
N6762Q	Grumman Acft Eng Cor-Schweizer G-164A	Fixed-wing, single engine	Individual owner Maryland	Restricted	2020-07-20	Valid
N29931	North American AT-6G	Fixed-wing, single engine	Texan Aero Plain LLC Eden Prairie, Minnesota	Standard	2020-07-17	Valid
N725SD	North American T-6G	Fixed-wing, single engine	Biggin Hill LLC Canyon Lake, California	Standard	2020-07-13	Valid
N301WD	Air Tractor Inc AT-301	Fixed-wing, single engine	Carlson Production Services LLC Norcross, Minnesota	Restricted	2020-07-02	Valid
N5396	Grumman Acft Eng Cor-Schweizer G-164A	Fixed-wing, single engine	Hershey Flying Service David City, Nebraska	Restricted	2020-06-29	Valid
N156SG	North American SNJ-5	Fixed-wing, single engine	T-6 Texan Sg LLC Midway, Utah	Standard	2020-06-22	Valid
N3653G	North American BRITISH HARVARD	Fixed-wing, single engine	N3653G LLC Midland, Texas	Standard	2020-06-15	Valid
N8039V	Rockwell International S-2R	Fixed-wing, single engine	Jsh Farms INC Wapato, Washington	Restricted	2020-06-11	Valid
N447TA	Grumman Acft Eng Cor-Schweizer G-164B	Fixed-wing, single engine	Thompson Aero INC Amana, Iowa	Restricted	2020-06-08	Valid
N244SM	Canadian Car & Foundry HARVARD MK IV	Fixed-wing, single engine	Milson Enterprises INC Midlothian, Texas	Experimental	2020-06-05	Valid
N7502Y	Schweizer Aircraft Corp G-164B	Fixed-wing, single engine	Individual owner California	Restricted	2020-05-27	Valid
N8718H	Grumman Acft Eng Cor-Schweizer G-164A	Fixed-wing, single engine	Individual owner California	Restricted	2020-05-27	Valid
N9890C	North American T-6G	Fixed-wing, single engine	Individual owner Delaware	Standard	2020-05-22	Valid
N97TR	North American AT-6C	Fixed-wing, single engine	Royal Eagle Squardron INC Bellevue, Washington	Standard	2020-05-18	Valid
N5569X	Aero Commander S2R	Fixed-wing, single engine	Individual owner Idaho	Restricted	2020-05-15	Valid
N7431	Canadian Car & Foundry HARVARD MK IV	Fixed-wing, single engine	Kindred Harvard LLC Kindred, North Dakota	Experimental	2020-05-12	Valid
N9179N	Air Tractor Inc AT-401	Fixed-wing, single engine	Individual owner Nevada	Restricted	2020-05-06	Valid
N3160T	Air Tractor Inc AT-301	Fixed-wing, single engine	Individual owner Illinois	Restricted	2020-04-30	Valid
N8700V	Snow 600 S-2D	Fixed-wing, single engine	Riggin Flight Service INC Madison, South Dakota	Restricted	2020-04-28	Valid
N3261G	North American SNJ-5	Fixed-wing, single engine	Ms Aero INC Lakeville, Ohio	Standard	2020-04-21	Valid
N30306	North American/Benner R A Jr SNJ-5	Fixed-wing, single engine	Buelen Brian V Mesa, Arizona	Standard	2020-04-16	Valid
N3747X	North American-Medore SNJ-5	Fixed-wing, single engine	Snj Five LLC Poplar Grove, Illinois	Standard	2020-04-15	Valid
N7095C	North American AT-6D	Fixed-wing, single engine	Co-owned owner Florida	Standard	2020-04-14	Valid
N7214C	North American AT-6D	Fixed-wing, single engine	Individual owner Texas	Standard	2020-04-14	Valid
N15449	Air Tractor Inc AT-401	Fixed-wing, single engine	Headwaters Flying Service LLC Three Forks, Montana	Restricted	2020-04-09	Valid
N21VS	North American T-6G	Fixed-wing, single engine	Individual owner Louisiana	Standard	2020-04-09	Valid
N365TA	North American T-6G	Fixed-wing, single engine	Jabjr Investments Waller, Texas	Standard	2020-04-09	Valid
N7010C	North American SNJ-5	Fixed-wing, single engine	Liberty Aviation Museum Port Clinton, Ohio	None on file	2020-04-08	Valid
N48402	Grumman Acft Eng Cor-Schweizer G-164A	Fixed-wing, single engine	Individual owner Mississippi	Restricted	2020-03-19	Valid
N94444	North American/Victoria Mnt Lt AT-6A	Fixed-wing, single engine	American Heritage Aviation INC Peachtree City, Georgia	Standard	2020-03-12	Valid
N6777K	Grumman Acft Eng Cor-Schweizer G-164B	Fixed-wing, single engine	Morgans Flying Service LLC Morse, Louisiana	Restricted	2020-03-11	Valid
N1015L	Air Tractor Inc AT-401	Fixed-wing, single engine	International Air Services INC Trustee Carson City, Nevada	Restricted	2020-03-10	Valid
N9197Q	Air Tractor Inc AT-401	Fixed-wing, single engine	International Air Services INC Trustee Carson City, Nevada	Restricted	2020-03-10	Valid
N9197V	Air Tractor Inc AT-401	Fixed-wing, single engine	A+ Aviation Services LLC Goodland, Kansas	Restricted	2020-03-10	Valid
N3167G	North American T-6G	Fixed-wing, single engine	Fighter Flights LLC Ashland, Virginia	Standard	2020-03-05	Valid
N6865	North American HARVARD MK IV	Fixed-wing, single engine	Atw Aviation INC Tucson, Arizona	Experimental	2020-02-19	Valid
N3298U	Ayres Corporation S-2R	Fixed-wing, single engine	Air Dakota Flite INC Hettinger, North Dakota	Restricted	2020-02-12	Valid
N9135	Fairchild 71	Fixed-wing, single engine	Individual owner Texas	Standard	2020-02-11	Valid
N5642X	Aero Commander S2R	Fixed-wing, single engine	Scott Cattle Company LLC Burlington, Colorado	Restricted	2020-01-29	Valid
N60645	North American SNJ-2	Fixed-wing, single engine	Individual owner Alaska	Standard	2020-01-28	Valid
N432RT	North American T-6G	Fixed-wing, single engine	Snj745 LLC Coral Springs, Florida	Standard	2020-01-27	Valid
N554Q	North American AT-6D	Fixed-wing, single engine	Spanky T6 LLC Wilmington, Delaware	Standard	2020-01-27	Valid
N9632	Grumman Acft Eng Cor-Schweizer G-164A	Fixed-wing, single engine	Individual owner California	Restricted	2020-01-15	Valid
N8260K	Grumman Acft Eng Cor-Schweizer G-164B	Fixed-wing, single engine	Bank of Utah Trustee Salt Lake City, Utah	Restricted	2020-01-14	Valid
N5598X	Aero Commander S2R	Fixed-wing, single engine	Individual owner California	Restricted	2020-01-10	Valid
N8651H	Grumman Acft Eng Cor-Schweizer G-164A	Fixed-wing, single engine	Individual owner Washington	Restricted	2020-01-03	Valid
N4434N	North American AT-6C(SNJ-4)	Fixed-wing, single engine	Moonshot Marketing LLC Carson City, Nevada	Standard	2019-12-30	Valid
N3024V	Ayres Corporation S-2R	Fixed-wing, single engine	Thomas Air Service INC Hastings, Nebraska	Restricted	2019-12-20	Valid
N6000Y	Air Tractor Inc AT-401B	Fixed-wing, single engine	A+ Aviation Services LLC Goodland, Kansas	Restricted	2019-12-19	Valid
N722AC	North American AT-6G	Fixed-wing, single engine	Djm Aviation Services LLC Greensboro, Georgia	Standard	2019-12-17	Valid
N3645F	North American SNJ-5	Fixed-wing, single engine	N3645F LLC Aurora, Colorado	Standard	2019-12-13	Valid
N7248	Grumman Acft Eng Cor-Schweizer G-164A	Fixed-wing, single engine	Currie Flying Service LLC Kennard, Texas	Restricted	2019-12-09	Valid
N3627G	Schweizer Aircraft Corp G-164B	Fixed-wing, single engine	Buntings Dusting INC Berlin, Maryland	Restricted	2019-12-05	Valid
N5557V	North American AT-6G	Fixed-wing, single engine	Co-owned owner Texas	Standard	2019-12-04	Valid
N3125N	Dehavilland DHC-3	Fixed-wing, single engine	Katmai Air LLC Anchorage, Alaska	Standard	2019-12-03	Valid
N775WA	Grumman G-73	Fixed-wing, multi-engine	Yanks Air Museum Baldwin Park, California	Standard	2019-11-26	Valid
N246Z	North American AT-6	Fixed-wing, single engine	N246Z LLC Seattle, Washington	Standard	2019-11-19	Valid
N1746S	Aero Commander S2R	Fixed-wing, single engine	Wilde Air Service LLC Volga, South Dakota	Restricted	2019-11-06	Valid
N4250X	Rockwell International S-2R	Fixed-wing, single engine	Dodson International Parts INC Rantoul, Kansas	Restricted	2019-10-23	Valid
N551LD	Canadian Car & Foundry HARVARD MK IV	Fixed-wing, single engine	Gooi LLC Missoula, Montana	Experimental	2019-10-08	Valid
N5ZS	North American T-6G	Fixed-wing, single engine	Jetran LLC Horseshoe Bay, Texas	Standard	2019-09-30	Valid
N7421C	North American AT-6	Fixed-wing, single engine	Individual owner Texas	Standard	2019-09-11	Valid
N9530C	North American AT-6C(SNJ-4)	Fixed-wing, single engine	Individual owner Kansas	Standard	2019-09-05	Valid
N7033C	North American AT-6C	Fixed-wing, single engine	Individual owner Texas	Standard	2019-08-29	Valid
N252W	North American SNJ-5	Fixed-wing, single engine	Individual owner Texas	Standard	2019-08-07	Valid
N4906X	Rockwell International S-2R	Fixed-wing, single engine	Allied Sprayers INC Hawley, Texas	Restricted	2019-08-05	Valid
N57271	Boeing A75N1(PT17)	Fixed-wing, single engine	3G Classic Aviation INC Wilmington, Delaware	Restricted	2019-07-31	Valid
N6795Q	Grumman Acft Eng Cor-Schweizer G-164B	Fixed-wing, single engine	Wells Air Service INC Scotia, Nebraska	Restricted	2019-07-24	Valid
N5680X	Aero Commander S2R	Fixed-wing, single engine	Precision Aerial LLC Coleman, Georgia	Restricted	2019-07-17	Valid
N5510X	Aero Commander S2R	Fixed-wing, single engine	Individual owner Texas	Restricted	2019-07-10	Valid
N8865Q	Aero Commander S2R	Fixed-wing, single engine	Olsem Aerial Application Services LLC Westbrook, Minnesota	Restricted	2019-07-10	Valid
N3173N	North American AT-6	Fixed-wing, single engine	Simply Living LLC Fort Myers, Florida	Standard	2019-07-08	Valid
N7520U	Canadian Car & Foundry HARVARD MK IV	Fixed-wing, single engine	Individual owner Texas	Experimental	2019-07-02	Valid
N4535U	Air Tractor Inc AT-401	Fixed-wing, single engine	Cga Holdings LLC Kalispell, Montana	Restricted	2019-06-25	Valid
N6975C	North American AT-6G	Fixed-wing, single engine	North American 75 Charlie LLC Redlands, California	Standard	2019-06-19	Valid
N4332S	Air Tractor Inc AT-301	Fixed-wing, single engine	Individual owner Alabama	Restricted	2019-06-10	Valid
N9801C	North American SNJ-5	Fixed-wing, single engine	Individual owner New Jersey	Standard	2019-06-07	Valid
N7503L	Schweizer Aircraft Corp G-164B	Fixed-wing, single engine	Cw Equipment Rentals INC Biggs, California	Restricted	2019-06-06	Valid
N491K	Dehavilland DHC-3	Fixed-wing, single engine	Katmai Air LLC Anchorage, Alaska	Restricted	2019-05-29	Valid
N99NS	North American HARVARD MKII	Fixed-wing, single engine	Individual owner California	Standard	2019-05-22	Valid
N5046X	Ayres Corporation S-2R	Fixed-wing, single engine	Individual owner Nebraska	Restricted	2019-05-20	Valid
N4205X	Rockwell International S-2R	Fixed-wing, single engine	Individual owner Texas	Restricted	2019-05-09	Valid
N3659T	Air Tractor Inc AT-301	Fixed-wing, single engine	Aura LLC Elsie, Michigan	Restricted	2019-04-22	Valid
N990CC	North American T-6G	Fixed-wing, single engine	Barton Aviation LLC San Antonio, Texas	Standard	2019-04-17	Valid
N43771	North American AT-6D	Fixed-wing, single engine	Individual owner California	Standard	2019-04-16	Valid
N3169A	Air Tractor Inc AT-301	Fixed-wing, single engine	Individual owner North Dakota	Restricted	2019-04-15	Valid
N61775	Air Tractor Inc AT-401B	Fixed-wing, single engine	Cruce Aviation Llc-Series Leasing Marquette Heights, Illinois	Restricted	2019-03-04	Valid
N3680F	North American SNJ-5	Fixed-wing, single engine	Vandelay America LLC Newport Beach, California	Standard	2019-02-14	Valid
N9816	Grumman Acft Eng Cor-Schweizer G-164A	Fixed-wing, single engine	Individual owner California	Restricted	2019-01-17	Valid
N2WS	Canadian Car & Foundry HARVARD MK IV	Fixed-wing, single engine	Individual owner Tennessee	Experimental	2019-01-10	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.