Engines · piston (reciprocating) · data as of October 8, 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

Model families, as a table

	aircraft
North American AT-6 Texan	183
Grumman Acft Eng Cor-Schweizer G-164	149
North American SNJ-5 Texan (Navy)	118
North American T-6 Texan	92
Air Tractor Inc AT-301	66
Aero Commander S2	55
Rockwell International S-2	54
Air Tractor Inc AT-401	52
Ayres Corporation S-2	48
Canadian Car & Foundry HARVARD MK IV	43
Schweizer Aircraft Corp G-164	41
North American SNJ-4	36

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

By state, as a table

	aircraft
California	174
Texas	154
Washington	52
North Dakota	50
Delaware	46
Minnesota	43
Nebraska	39
Florida	36
Colorado	34
Illinois	33

Kind of aircraft

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

By kind, as a table

	aircraft	share
Piston singles	1,136	92%
Turboprops	75	6%
Piston twins	17	1%
Helicopters	2	0.2%

When the aircraft were built by decade

By decade built, as a table

	aircraft
1920	5
1930	16
1940	310
1950	181
1960	50
1970	297
1980	91
1990	54
2000	4
2010	1
2020	1

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

Failure reports by year, as a table

	reports
95	2
96	3
97	5
98	1
99	1
00	1
01	3
02	5
04	3
05	9
06	4
07	3
08	3
10	5
11	4
12	1
13	1
14	2
15	1
18	1

Parts most often reported as the reports name them

Cylinder6Engine4Cylinder Head3Exhaust Valve3Nut3Attach Angle2Roller2Strut2Angle1Battery1

Parts most reported, as a table

	reports
Cylinder	6
Engine	4
Cylinder Head	3
Exhaust Valve	3
Nut	3
Attach Angle	2
Roller	2
Strut	2
Angle	1
Battery	1

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

The whole map of how records connect · these connections as data: /graph/engine/pratt-whitney-r1340-series.json.

Aircraft newest certificates first · 1,230

Tail no.	Maker and model	Group	Owner and base	Certificate	Registered	Status
N727KT	Dehavilland DHC-3	Fixed-wing, single engine	Rustair INC Anchorage, Alaska	Standard	2002-07-31	Valid
N4485	North American SNJ-6	Fixed-wing, single engine	Co-owned owner California	Experimental	2002-05-21	Valid
N791MH	North American T-6G	Fixed-wing, single engine	Henley Aviation INC Greenwood, Mississippi	Standard	2002-05-10	Valid
N79480	Boeing A75N1(PT17)	Fixed-wing, single engine	Individual owner Texas	Restricted	2002-04-10	Valid
N4931N	Boeing E75	Fixed-wing, single engine	Individual owner Texas	Standard	2002-04-04	Valid
N3159P	Air Tractor Inc AT-301	Fixed-wing, single engine	Jarrett Airspray INC Jamestown, North Dakota	Restricted	2002-04-02	Valid
N8378	Grumman Acft Eng Cor-Schweizer G-164A	Fixed-wing, single engine	Co-owned owner Utah	Restricted	2002-03-08	Valid
N1792S	Aero Commander 600 S-2D	Fixed-wing, single engine	Individual owner Montana	Restricted	2002-02-26	Valid
N4995C	North American T-6G	Fixed-wing, single engine	Individual owner California	Experimental	2001-11-13	Valid
N9778	Grumman Acft Eng Cor-Schweizer G-164A	Fixed-wing, single engine	Co-owned owner South Carolina	Restricted	2001-10-10	Valid
N9630	Grumman Acft Eng Cor-Schweizer G-164A	Fixed-wing, single engine	Minturn Spraying CO INC Dillon, South Carolina	Restricted	2001-08-30	Valid
N241F	North American SNJ-5	Fixed-wing, single engine	Individual owner California	Standard	2001-08-21	Valid
N5028Q	Air Tractor Inc AT-401B	Fixed-wing, single engine	Tri Rotor Spray & Chemical Ulysses, Kansas	Restricted	2001-08-14	Valid
N85JR	North American AT-6G	Fixed-wing, single engine	Pond Warbirds LLC Reno, Nevada	Standard	2001-07-03	Valid
N104BM	Dehavilland DHC-3	Fixed-wing, single engine	Individual owner Alaska	Standard	2001-04-17	Valid
N2441	North American T-6G	Fixed-wing, single engine	Individual owner Texas	Standard	2001-04-12	Valid
N68144	Consolidated Vultee BT-13A	Fixed-wing, single engine	Egmond Aircraft LLC Lewes, Delaware	Restricted	2001-03-15	Valid
N91073	North American SNJ-5C	Fixed-wing, single engine	Brooks Elton D Douglas, Georgia	Standard	2001-02-21	Valid
N5557X	Ayres Corporation S-2R	Fixed-wing, single engine	Individual owner Maine	Restricted	2001-02-12	Valid
N8429K	Schweizer Aircraft Corp G-164B	Fixed-wing, single engine	Vincent Flying Service INC Kaplan, Louisiana	Restricted	2001-01-26	Valid
N3632F	North American/Victoria Mnt Lt AT-6A	Fixed-wing, single engine	Individual owner Texas	Standard	2001-01-11	Valid
N56478	Consolidated Vultee BT-13A	Fixed-wing, single engine	American Airpower Heritage Flying Museum Dallas, Texas	Experimental	2000-11-08	Valid
N800SH	North American AT-6D	Fixed-wing, single engine	Barton Aviation LLC Colorado Springs, Colorado	Standard	2000-10-31	Valid
N3307	North American T-6G	Fixed-wing, single engine	Individual owner Oregon	Standard	2000-10-06	Valid
N4486	North American SNJ-6	Fixed-wing, single engine	Berry Machine & Tool CO INC Camden, Tennessee	Standard	2000-09-27	Valid
N56360	Convair BT-13A	Fixed-wing, single engine	American Airpower Heritage Flying Museum INC Dallas, Texas	Standard	2000-09-11	Valid
N7704C	North American T-6G	Fixed-wing, single engine	Individual owner Illinois	Standard	2000-09-11	Valid
N604R	North American AT-6	Fixed-wing, single engine	Individual owner Florida	Experimental	2000-08-15	Valid
N226UT	Dehavilland DHC-3	Fixed-wing, single engine	Otters R US LLC Chitina, Alaska	Standard	2000-06-29	Valid
N12YZ	Grumman G-73	Fixed-wing, multi-engine	Tanglefoot Wing & Wheel CO Coolin, Idaho	Standard	2000-05-23	Valid
N8497	Grumman Acft Eng Cor-Schweizer G-164A	Fixed-wing, single engine	Individual owner Maryland	Restricted	2000-04-06	Valid
N8966Q	Aero Commander S2R	Fixed-wing, single engine	Individual owner Texas	Restricted	2000-04-04	Valid
N48524	Grumman Acft Eng Cor-Schweizer G-164A	Fixed-wing, single engine	Individual owner New Mexico	Restricted	2000-01-13	Valid
N190FS	North American AT-6D	Fixed-wing, single engine	Individual owner Washington	Standard	2000-01-07	Valid
N3659D	Air Tractor Inc AT-301	Fixed-wing, single engine	Anf Air Service INC Garwood, Texas	Restricted	2000-01-04	Valid
N4983N	North American AT-6D	Fixed-wing, single engine	Co-owned owner Illinois	Standard	1999-12-16	Valid
N7500U	Grumman American Avn. Corp. G-164B	Fixed-wing, single engine	Individual owner Alabama	Restricted	1999-11-10	Valid
N85169	North American SNJ-5	Fixed-wing, single engine	Individual owner Wyoming	Experimental	1999-09-29	Valid
N8994	North American HARVARD 2	Fixed-wing, single engine	Individual owner Ohio	Experimental	1999-09-28	Valid
N452WA	North American SNJ-6	Fixed-wing, single engine	Warbird Adventures INC Ocoee, Florida	Standard	1999-09-17	Valid
N555VJ	North American T-6G	Fixed-wing, single engine	T-6 LLC Waukesha, Wisconsin	Standard	1999-09-13	Valid
N8735H	Grumman Acft Eng Cor-Schweizer G-164A	Fixed-wing, single engine	Individual owner Minnesota	Restricted	1999-08-12	Valid
N39GJ	Air Tractor Inc AT-401B	Fixed-wing, single engine	Tri County AG Service INC Ipswich, South Dakota	Restricted	1999-07-12	Valid
N55252	Boeing A75N1(PT17)	Fixed-wing, single engine	Individual owner Ohio	Standard	1999-06-15	Valid
N5236S	Air Tractor Inc AT-301	Fixed-wing, single engine	Individual owner Texas	Restricted	1999-06-01	Valid
N6643C	North American AT-6D	Fixed-wing, single engine	Individual owner Colorado	Standard	1999-05-28	Valid
N4426S	Air Tractor Inc AT-301	Fixed-wing, single engine	Crop-Serv INC Meade, Kansas	Restricted	1999-05-13	Valid
N4003Y	Ayres Corporation S-2R	Fixed-wing, single engine	Individual owner Georgia	Restricted	1999-04-19	Valid
N28955	North American SNJ-5	Fixed-wing, single engine	Co-owned owner Texas	Experimental	1999-03-23	Valid
N587CB	Canadian Car & Foundry HARVARD MK IV	Fixed-wing, single engine	Individual owner Ohio	Experimental	1999-02-23	Valid
N12KY	North American SNJ-5	Fixed-wing, single engine	North American War Bird LLC Wilmington, Delaware	Standard	1999-01-13	Valid
N1054M	North American T-6G	Fixed-wing, single engine	Individual owner North Dakota	Standard	1998-10-27	Valid
N3717G	North American AT-6G	Fixed-wing, single engine	Individual owner Illinois	Standard	1998-10-21	Valid
N104DC	North American T-6G	Fixed-wing, single engine	Co-owned owner Florida	Standard	1998-08-20	Valid
N8586S	Air Tractor Inc AT-301	Fixed-wing, single engine	R & D Leasing INC Lemoore, California	Restricted	1998-08-06	Valid
N8424V	Rockwell International S-2R	Fixed-wing, single engine	Jones Aviation INC Biggs, California	Restricted	1998-05-15	Valid
N3157C	Air Tractor Inc AT-301	Fixed-wing, single engine	Individual owner Washington	Restricted	1998-05-12	Valid
N5526X	Aero Commander S2R	Fixed-wing, single engine	Co-owned owner New Mexico	Experimental	1998-04-14	Valid
N63495	Boeing A75N1(PT17)	Fixed-wing, single engine	Individual owner California	Standard	1998-03-31	Valid
N29BS	North American AT-6D	Fixed-wing, single engine	First Volunteer Warbirds INC Wilmington, Delaware	Standard	1998-03-12	Valid
N7653A	North American/Victoria Mnt Lt AT-6A	Fixed-wing, single engine	Co-owned owner Texas	Standard	1998-02-13	Valid
N61563	North American SNJ-2	Fixed-wing, single engine	Training Services INC T/A Virginia Beach, Virginia	Restricted	1998-01-28	Valid
N8494K	Schweizer Aircraft Corp G-164B	Fixed-wing, single engine	Haley Flying Service INC Tracy, California	Restricted	1997-12-10	Valid
N6971C	North American SNJ-5	Fixed-wing, single engine	Co-owned owner Arizona	Standard	1997-08-18	Valid
N791H	Stearman Aircraft 4E	Fixed-wing, single engine	Individual owner Nevada	Standard	1997-07-31	Valid
N4859X	Rockwell International S-2R	Fixed-wing, single engine	AG Aviation Equipment LLC Pond Creek, Oklahoma	Restricted	1997-06-26	Valid
N17TF	North American T-6G	Fixed-wing, single engine	Comanche Warbirds INC Houston, Texas	Standard	1997-05-23	Valid
N1725S	Aero Commander 600 S-2D	Fixed-wing, single engine	Individual owner Montana	Restricted	1997-05-22	Valid
N168WS	Grumman G-73	Fixed-wing, multi-engine	Pantechnicon Aviation LTD Minden, Nevada	Standard	1997-04-26	Valid
N9192B	Air Tractor Inc AT-401	Fixed-wing, single engine	Kracke Spraying Service INC Fargo, North Dakota	Restricted	1997-02-07	Valid
N5270V	North American T-6G	Fixed-wing, single engine	Individual owner Maryland	Standard	1996-12-17	Valid
N48383	Grumman Acft Eng Cor-Schweizer G-164A	Fixed-wing, single engine	Individual owner Louisiana	Restricted	1996-11-08	Valid
N44713	Naval Aircraft Factory N3N-3	Fixed-wing, single engine	Co-owned owner California	Restricted	1996-08-06	Valid
N44742	Naval Aircraft Factory N3N-3	Fixed-wing, single engine	Co-owned owner California	Restricted	1996-08-06	Valid
N44837	Naval Aircraft Factory N3N-3	Fixed-wing, single engine	Co-owned owner California	Restricted	1996-08-06	Valid
N61241	Curtiss Wright O-52	Fixed-wing, single engine	Co-owned owner California	Limited	1996-08-06	Valid
N3724G	North American SNJ-5	Fixed-wing, single engine	C & P Aviation Services INC Blaine, Minnesota	Standard	1996-07-15	Valid
N45057	Naval Aircraft Factory N3N-3	Fixed-wing, single engine	Ace Aeromotive INC Miami, Florida	Restricted	1996-06-11	Valid
N3299D	Ayres Corporation S-2R	Fixed-wing, single engine	Allen Chorman & Son INC Milton, Delaware	Restricted	1996-03-12	Valid
N48153	North American-Banaire Entprs. SNJ-4	Fixed-wing, single engine	Wright Jeffrey C Canby, Oregon	Standard	1996-02-08	Valid
N211A	North American SNJ-6	Fixed-wing, single engine	Individual owner New Jersey	Standard	1996-01-26	Valid
N66WP	North American T-6G	Fixed-wing, single engine	North American Restorations Memphis, Tennessee	Standard	1996-01-22	Valid
N9825	Grumman Acft Eng Cor-Schweizer G-164A	Fixed-wing, single engine	Individual owner Minnesota	Restricted	1996-01-22	Valid
N6437D	North American AT-6D	Fixed-wing, single engine	Claire Aviation INC Wilmington, Delaware	Standard	1995-09-05	Valid
N50P	North American NAVION	Fixed-wing, single engine	Individual owner Virginia	Standard	1995-08-21	Valid
N7721Z	North American AT-6G	Fixed-wing, single engine	Medical Diagnostic Imaging INC Sacramento, California	Standard	1995-06-28	Valid
N22KD	North American AT-6C	Fixed-wing, single engine	Musick Aircraft CORP Greenwood, Mississippi	Standard	1995-06-13	Valid
N4999X	Rockwell International S-2R	Fixed-wing, single engine	Fountain INC Moscow, Idaho	Restricted	1995-06-05	Valid
N9982	Grumman Acft Eng Cor-Schweizer G-164A	Fixed-wing, single engine	Individual owner California	Restricted	1995-05-25	Valid
N252TA	Dehavilland DHC-3	Fixed-wing, single engine	Talon Air Service INC Soldotna, Alaska	Standard	1995-03-13	Valid
N58226	Boeing A75	Fixed-wing, single engine	Individual owner Washington	Restricted	1995-02-15	Valid
N9826H	Boeing B75N1	Fixed-wing, single engine	Johnson Lawrence F Colville, Washington	Restricted	1995-02-15	Valid
N75096	Schweizer Aircraft Corp G-164B	Fixed-wing, single engine	Sutter Butte Dusters INC Live Oak, California	Restricted	1994-07-23	Valid
N75990	Boeing A75	Fixed-wing, single engine	Individual owner Mississippi	Restricted	1994-07-01	Valid
N6722K	Grumman Acft Eng Cor-Schweizer G-164C	Fixed-wing, single engine	Thayer Agricultural Aviation INC Grimes, California	Restricted	1994-06-10	Valid
N73135	Air Tractor Inc AT-401	Fixed-wing, single engine	Individual owner Texas	Restricted	1994-04-06	Valid
N7502M	Schweizer Aircraft Corp G-164B	Fixed-wing, single engine	Richter Aviation INC Maxwell, California	Restricted	1994-03-02	Valid
N154CF	North American AT-6D	Fixed-wing, single engine	Individual owner Washington	Standard	1994-03-01	Valid
N7016Y	Grumman American Avn. Corp. G-164B	Fixed-wing, single engine	AG Aviation Service INC Elkhorn, Wisconsin	Restricted	1994-01-18	Valid
N1254	Canadian Car & Foundry HARVARD MK IV	Fixed-wing, single engine	Individual owner California	Experimental	1993-11-15	Valid

Source: FAA Civil Aviation Registry, Releasable Aircraft Database (the engine reference table and each aircraft's engine code), October 8, 2026. Horsepower and thrust are the FAA's figures for the series, not for a particular aircraft.

	reports
95	2
96	3
97	5
98	1
99	1
00	1
01	3
02	5
04	3
05	9
06	4
07	3
08	3
10	5
11	4
12	1
13	1
14	2
15	1
18	1

	reports
95	2
96	3
97	5
98	1
99	1
00	1
01	3
02	5
04	3
05	9
06	4
07	3
08	3
10	5
11	4
12	1
13	1
14	2
15	1
18	1

	reports
95	2
96	3
97	5
98	1
99	1
00	1
01	3
02	5
04	3
05	9
06	4
07	3
08	3
10	5
11	4
12	1
13	1
14	2
15	1
18	1