Engines · piston (reciprocating) · data as of October 8, 2026

Pratt & Whitney R-985 series

1,594 aircraft on the U.S. register carry a Pratt & Whitney R-985 series engine, rated at about 450 horsepower. The Boeing A75 Stearman Kaydet is the model most often fitted with it (236 aircraft). The aircraft carrying it were built between 1929 and 2013.

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 R-985 series. FAA spelling: R-985 SERIES.

Fitted to model families

Model families, as a table

	aircraft
Boeing A75 Stearman Kaydet	236
Dehavilland DHC-2	133
Beechcraft D17	106
Boeing E75 Stearman Kaydet	105
Grumman Acft Eng Cor-Schweizer G-164	98
Howard Aircraft DGA-15	72
Dehavilland BEAVER DHC-2 MK.1	65
Naval Aircraft Factory N3	53
Consolidated Vultee BT-13	53
Beechcraft E18	51
Beechcraft C-45	49
Boeing B75 Stearman Kaydet	48

Boeing A75 Stearman Kaydet · Dehavilland DHC-2 · Beechcraft D17 · Boeing E75 Stearman Kaydet · Grumman Acft Eng Cor-Schweizer G-164 · Howard Aircraft DGA-15 · Dehavilland BEAVER DHC-2 MK.1 · Naval Aircraft Factory N3 · Consolidated Vultee BT-13 · Beechcraft E18

Where they are owner's state

Alaska161Texas158California146Washington85Florida66Delaware62Minnesota49Oregon40Missouri39Colorado38

By state, as a table

	aircraft
Alaska	161
Texas	158
California	146
Washington	85
Florida	66
Delaware	62
Minnesota	49
Oregon	40
Missouri	39
Colorado	38

Kind of aircraft

Piston singles1,291 (81%)Piston twins262 (16%)Turboprops40 (3%)Helicopters1 (0.1%)

By kind, as a table

	aircraft	share
Piston singles	1,291	81%
Piston twins	262	16%
Turboprops	40	3%
Helicopters	1	0.1%

When the aircraft were built by decade

By decade built, as a table

	aircraft
1920	13
1930	63
1940	622
1950	318
1960	114
1970	105
1980	10
1990	33
2000	6
2010	2

What the FAA has certified, ordered and been told about the Pratt & Whitney R-985 series the component layer

No FAA order in the current files names this engine series. Operators and repair shops have filed 80 failure reports with the FAA since 1995, 23 of them in the last ten years.

Failure reports 80 since · what operators and shops told the FAA

Failure reports by year, as a table

	reports
95	3
96	2
97	3
98	1
99	4
00	2
01	6
02	8
03	5
04	7
05	6
06	3
07	7
08	2
09	5
10	3
11	2
12	2
13	2
14	2
15	2
16	1
17	2

Parts most often reported as the reports name them

Cylinder8Engine6Bulkhead3Piston3Pump3Spar3Bearing2Bolt2Carburetor2Control Cable2

Parts most reported, as a table

	reports
Cylinder	8
Engine	6
Bulkhead	3
Piston	3
Pump	3
Spar	3
Bearing	2
Bolt	2
Carburetor	2
Control Cable	2

Latest reports

2017-10-06Bearing: failed

2017-07-20Drag Link: damaged

2016-07-20Pushrod: broken

2015-08-18Fitting: corroded

2015-04-03Balance Weight: loose

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

Boeing A75 Stearman Kaydet 236 with this engine series
Dehavilland DHC-2 133 with this engine series
Beechcraft D17 106 with this engine series
Boeing E75 Stearman Kaydet 105 with this engine series
Grumman Acft Eng Cor-Schweizer G-164 98 with this engine series
Howard Aircraft DGA-15 72 with this engine series
Dehavilland BEAVER DHC-2 MK.1 65 with this engine series
Naval Aircraft Factory N3 53 with this engine series

Where they are

Alaska 161 of these aircraft
Texas 158 of these aircraft
California 146 of these aircraft
Washington 85 of these aircraft
Florida 66 of these aircraft

Biggest operators

Mid Continent Aircraft CORP 14 of these aircraft
Plane Fun INC Tr Trustee 9 of these aircraft
International Air Services INC Trustee 9 of these aircraft
Southern Aircraft Consultancy INC Trustee 7 of these aircraft
Eastern Stearman INC Trustee 7 of these aircraft

Airworthiness

Failure reports on the Pratt & Whitney R-985 series 80 reports since 1995

Analytics

The whole map of how records connect · these connections as data: /graph/engine/pratt-whitney-r-985-series.json.

Aircraft newest certificates first · 1,594

Tail no.	Maker and model	Group	Owner and base	Certificate	Registered	Status
N1185V	Beech D17S	Fixed-wing, single engine	Co-owned owner California	Standard	2012-12-12	Valid
N32RA	Schweizer Aircraft Corp G-164B	Fixed-wing, single engine	Zumwalt Aviation LLC Sheldon, Illinois	Restricted	2012-12-06	Valid
N651B	Beech D18S	Fixed-wing, multi-engine	Sjc IV LLC Lawrence, Kansas	Standard	2012-12-06	Valid
N44827	Naval Aircraft Factory N3N-3	Fixed-wing, single engine	Individual owner California	Restricted	2012-12-04	Valid
N58987	Boeing E75	Fixed-wing, single engine	Individual owner Wyoming	Standard	2012-11-20	Valid
N4858N	Boeing B75	Fixed-wing, single engine	Jim Kimball Enterprises INC Mount Dora, Florida	Restricted	2012-11-13	Valid
N1712B	Boeing A75N1(PT17)	Fixed-wing, single engine	Individual owner Michigan	Restricted	2012-11-01	Valid
N309MD	Avions Holste Max 1521 C1	Fixed-wing, single engine	Martin Jeff S Wasco, California	Experimental	2012-11-01	Valid
N985P	Dehavilland DHC-2 MK. I(L20A)	Fixed-wing, single engine	985P LLC Seattle, Washington	Standard	2012-10-11	Valid
N10247	Grumman G-164	Fixed-wing, single engine	Ferrspray Aerial Application LLC Marengo, Illinois	Restricted	2012-10-09	Valid
N4814V	Boeing E75	Fixed-wing, single engine	Individual owner Missouri	Restricted	2012-10-09	Valid
N68809	Boeing E75	Fixed-wing, single engine	Individual owner California	Standard	2012-10-01	Valid
N663TB	Beech H-18	Fixed-wing, multi-engine	Individual owner California	Standard	2012-09-28	Valid
N51876	Boeing PT-17	Fixed-wing, single engine	Mission Boston D Day LLC Parker, Colorado	Experimental	2012-09-27	Valid
N109KS	Dehavilland BEAVER DHC-2 MK.1	Fixed-wing, single engine	Rs Specialties LLC Anchorage, Alaska	Standard	2012-08-24	Valid
N5366	Grumman G-164A	Fixed-wing, single engine	Haynes Robert K Pilot Point, Texas	Restricted	2012-08-14	Valid
N9301Z	Dehavilland DHC-2	Fixed-wing, single engine	Bristol Bay Mission Lodge LLC Anchorage, Alaska	Standard	2012-08-01	Valid
N213SP	Beech C-45H	Fixed-wing, multi-engine	Beech O Sphere LLC Casper, Wyoming	Standard	2012-07-27	Valid
N10JX	Dehavilland DHC-2 MK 1	Fixed-wing, single engine	Individual owner Alaska	Standard	2012-07-26	Valid
N460DB	Dehavilland BEAVER DHC-2 MK.1	Fixed-wing, single engine	Bristol Bay Mission Lodge LLC Anchorage, Alaska	Multiple	2012-07-26	Valid
N7333N	Dehavilland DHC-2	Fixed-wing, single engine	Bristol Bay Mission Lodge LLC Anchorage, Alaska	Multiple	2012-07-26	Valid
N789	Grumman G-21A	Fixed-wing, multi-engine	Alaska Aviation Museum Anchorage, Alaska	Standard	2012-07-09	Valid
N8159	Curtiss Wright TRAVEL AIR S-6000-B	Fixed-wing, single engine	Alaska Aviation Museum Anchorage, Alaska	Standard	2012-07-09	Valid
N68635	Beech SNB-1	Fixed-wing, multi-engine	Individual owner Tennessee	Standard	2012-07-05	Valid
N214CR	Beech AT-11	Fixed-wing, multi-engine	Co-owned owner Georgia	Standard	2012-06-25	Valid
N69696	Boeing A75N1(PT17)	Fixed-wing, single engine	Easy Air LLC Wilmington, Delaware	Standard	2012-06-19	Valid
N90275	Weatherly Aviation Co Inc 620B	Fixed-wing, single engine	Double M Farms LLC Walsh, Colorado	Restricted	2012-06-07	Valid
N5BA	Beech G18S	Fixed-wing, multi-engine	Carlsbad Raceway CORP Hemet, California	Standard	2012-06-06	Valid
N159F	Grumman G-21	Fixed-wing, multi-engine	Freshwater Adventures INC Dillingham, Alaska	None on file	2012-05-21	Valid
N908	Beech D18S	Fixed-wing, multi-engine	Individual owner Arkansas	Standard	2012-05-21	Valid
N4356G	Beech D18S	Fixed-wing, multi-engine	Top Hand INC Laurel, Montana	Standard	2012-05-15	Valid
N2032J	Weatherly Aviation Co Inc 620B	Fixed-wing, single engine	Arnt Aerial Spraying INC Worthington, Minnesota	Restricted	2012-05-14	Valid
N41F	Dehavilland BEAVER DHC-2 MK.1	Fixed-wing, single engine	Individual owner Minnesota	Standard	2012-05-03	Valid
N87597	Dehavilland BEAVER DHC-2	Fixed-wing, single engine	Seawind Aviation INC Ketchikan, Alaska	Standard	2012-04-17	Valid
N121SR	Grumman G-21A	Fixed-wing, multi-engine	Stick and Rudder Aviation INC Middletown, Delaware	Standard	2012-04-14	Valid
N9496R	Snow S2C	Fixed-wing, single engine	Individual owner Montana	Restricted	2012-03-12	Valid
N4794C	Dehavilland BEAVER DHC-2 MK.1	Fixed-wing, single engine	Kalinin Partners LLC Juneau, Alaska	Standard	2012-03-07	Valid
N743KP	Dehavilland DHC-2	Fixed-wing, single engine	Kalinin Partners LLC Juneau, Alaska	Standard	2012-03-07	Valid
N2513N	Dehavilland DHC-2	Fixed-wing, single engine	Wattum Investments LLC Kodiak, Alaska	Multiple	2012-03-01	Valid
N600T	Grumman G-164A	Fixed-wing, single engine	Individual owner Minnesota	Restricted	2012-02-28	Valid
N24BR	Dehavilland DHC-2	Fixed-wing, single engine	River Front Akn LLC Anchorage, Alaska	Multiple	2012-02-27	Valid
N5368N	Boeing E75	Fixed-wing, single engine	Individual owner Florida	Restricted	2012-02-23	Valid
N804RB	Boeing E75	Fixed-wing, single engine	Parker-O'Malley CORP Chatham, New York	Standard	2012-02-21	Valid
N777DH	Dehavilland DHC-2	Fixed-wing, single engine	Kalinin Partners LLC Juneau, Alaska	Standard	2012-02-13	Valid
N68263	Boeing A75N1(PT17)	Fixed-wing, single engine	Individual owner Colorado	Restricted	2012-02-09	Valid
N77V	Eicher Jeffrey M Z-1	Fixed-wing, single engine	Individual owner Florida	Experimental	2012-02-07	Valid
N3956B	Boeing E75	Fixed-wing, single engine	Jersey Devil Dusters LLC Southampton, New Jersey	Restricted	2012-02-06	Valid
N64384	Dehavilland BEAVER DHC-2 MK.1	Fixed-wing, single engine	Individual owner Washington	Standard	2012-01-30	Valid
N669VP	Kyle A Franklin DEMON 1	Fixed-wing, single engine	Jim Franklin Aviation Service INC Ruidoso, New Mexico	Experimental	2012-01-30	Valid
N241M	Lockheed ELECTRA 10-A	Fixed-wing, multi-engine	Aircraft Guaranty CORP Trustee Oklahoma City, Oklahoma	Standard	2012-01-26	Valid
N95467	Grumman G-21A	Fixed-wing, multi-engine	Co-owned owner Washington	Standard	2012-01-24	Valid
N450DB	Dehavilland BEAVER DHC-2 MK.1	Fixed-wing, single engine	Individual owner Washington	Standard	2012-01-03	Valid
N53129	Boeing A75N1(PT17)	Fixed-wing, single engine	Mississippi State University Starkville, Mississippi	Experimental	2011-12-15	Valid
N550LR	Boeing E75	Fixed-wing, single engine	Individual owner Indiana	Experimental	2011-12-15	Valid
N2069C	Beech E18S	Fixed-wing, multi-engine	Aztec Worldwide Airlines INC Wilmington, Delaware	Standard	2011-12-14	Valid
N6697Q	Grumman Acft Eng Cor-Schweizer G-164B	Fixed-wing, single engine	Individual owner Washington	Restricted	2011-11-02	Valid
N9075W	Weatherly 201C	Fixed-wing, single engine	Individual owner California	Restricted	2011-10-24	Valid
N6528K	Grumman Acft Eng Cor-Schweizer G-164B	Fixed-wing, single engine	Individual owner California	Restricted	2011-10-17	Valid
N50V	Sikorsky S-39-C	Fixed-wing, single engine	Individual owner Florida	Standard	2011-10-06	Valid
N1434Z	Dehavilland BEAVER DHC-2	Fixed-wing, single engine	Individual owner Oregon	Standard	2011-09-26	Valid
N755JM	Dehavilland BEAVER U-6A	Fixed-wing, single engine	Eastern Stearman INC Trustee Leesburg, Virginia	Standard	2011-09-06	Valid
N5604V	Howard Aircraft DGA-15P	Fixed-wing, single engine	Individual owner Washington	Standard	2011-08-31	Valid
N317MH	Beech E18S	Fixed-wing, multi-engine	Individual owner Indiana	Standard	2011-08-19	Valid
N56259	Boeing D75N1	Fixed-wing, single engine	Individual owner Texas	Restricted	2011-08-18	Valid
N79553	Boeing B75N1	Fixed-wing, single engine	Individual owner Florida	Restricted	2011-07-29	Valid
N6653K	Dehavilland DHC-2 MK. I(L20A)	Fixed-wing, single engine	Individual owner California	Standard	2011-07-26	Valid
N1719B	Boeing E75	Fixed-wing, single engine	Plyler Aviation LP Sherman, Texas	Standard	2011-07-23	Valid
N2002E	Weatherly Aviation Co Inc 620B	Fixed-wing, single engine	Individual owner Iowa	Restricted	2011-07-23	Valid
N22440	Howard Aircraft DGA-15P	Fixed-wing, single engine	Nebulous LLC Broomfield, Colorado	Standard	2011-07-12	Valid
N3647	Beech 3NM	Fixed-wing, multi-engine	Dakota Territory Air Museum Minot, North Dakota	Standard	2011-06-23	Valid
N36BC	Beech G18S	Fixed-wing, multi-engine	Bancroft Contracting CORP South Paris, Maine	Standard	2011-06-13	Valid
N8095E	Boeing E75	Fixed-wing, single engine	Individual owner Michigan	Restricted	2011-05-18	Valid
N5522N	Boeing A75N1(PT17)	Fixed-wing, single engine	Co-owned owner Idaho	Standard	2011-05-04	Valid
N8379	Grumman Acft Eng Cor-Schweizer G-164A	Fixed-wing, single engine	Rafter V Ranch INC Rio Oso, California	Restricted	2011-04-30	Valid
N915X	Grumman G-164A	Fixed-wing, single engine	Triple F Flying INC Benton, Pennsylvania	Restricted	2011-04-27	Valid
N3127B	Beech 3NM	Fixed-wing, multi-engine	Federal Aerial Applicators LLC Wilmington, Delaware	Multiple	2011-04-26	Valid
N5710N	Boeing B75N1	Fixed-wing, single engine	Dusters & Sprayers Supply INC Chickasha, Oklahoma	Restricted	2011-04-26	Valid
N39FG	Grumman G-21A	Fixed-wing, multi-engine	Diesel Acquisitions LLC Milpitas, California	Standard	2011-04-25	Valid
N8701H	Grumman Acft Eng Cor-Schweizer G-164A	Fixed-wing, single engine	Western Cooperative CO Alliance, Nebraska	Restricted	2011-03-30	Valid
N5291	Grumman G-164A	Fixed-wing, single engine	Sky Aviation CORP Worland, Wyoming	Restricted	2011-02-28	Valid
N555PC	Beech D17S	Fixed-wing, single engine	Co-owned owner Florida	Standard	2011-02-25	Valid
N63979	Boeing E75	Fixed-wing, single engine	Co-owned owner Texas	Restricted	2011-02-18	Valid
N68483	Boeing A75N1(PT17)	Fixed-wing, single engine	Individual owner Washington	Restricted	2011-01-21	Valid
N4383V	Cessna 195	Fixed-wing, single engine	Individual owner Florida	Standard	2011-01-18	Valid
N46871	Boeing A75N1(PT17)	Fixed-wing, single engine	Individual owner Washington	Experimental	2011-01-18	Valid
N9604R	Beech G18S	Fixed-wing, multi-engine	Individual owner California	Standard	2010-12-21	Valid
N5286	Grumman G-164A	Fixed-wing, single engine	Slikker Flying Service INC Buttonwillow, California	Restricted	2010-11-19	Valid
N55346	Boeing A75	Fixed-wing, single engine	Individual owner Washington	Standard	2010-11-02	Valid
N4512N	Beech D17S	Fixed-wing, single engine	Nimbus Aviation LLC Ponte Vedra Beach, Florida	Standard	2010-10-27	Valid
N125MB	Beech C-45H	Fixed-wing, multi-engine	Co-owned owner Arizona	Standard	2010-08-12	Valid
N790DB	Boeing B75N1	Fixed-wing, single engine	Individual owner Virginia	Standard	2010-07-15	Valid
N6726Q	Grumman Acft Eng Cor-Schweizer G-164B	Fixed-wing, single engine	Individual owner California	Restricted	2010-06-23	Valid
N213DE	Beech C-45H	Fixed-wing, multi-engine	Vintage Wings Aircraft LLC Centerpoint, Indiana	Standard	2010-05-11	Valid
N1400E	Beech E18S	Fixed-wing, multi-engine	Dynamic Avlease INC Bridgewater, Virginia	Standard	2010-05-04	Valid
N73377	Boeing A75N1(PT17)	Fixed-wing, single engine	Individual owner Pennsylvania	Restricted	2010-05-03	Valid
N59E	Beech E18S	Fixed-wing, multi-engine	Individual owner Florida	Standard	2010-04-13	Valid
N450V	Boeing B75N1	Fixed-wing, single engine	Flight Solutions LLC Columbia, Missouri	Standard	2010-03-25	Valid
N45229	Naval Aircraft Factory N3N-3	Fixed-wing, single engine	Individual owner Washington	Standard	2010-02-02	Valid
N30136	Waco UPF-7	Fixed-wing, single engine	Jim Franklin Aviation Service INC Ruidoso, New Mexico	Experimental	2010-01-28	Valid
N63912	Boeing N2S-3	Fixed-wing, single engine	Individual owner North Dakota	Restricted	2010-01-26	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	3
96	2
97	3
98	1
99	4
00	2
01	6
02	8
03	5
04	7
05	6
06	3
07	7
08	2
09	5
10	3
11	2
12	2
13	2
14	2
15	2
16	1
17	2

	reports
95	3
96	2
97	3
98	1
99	4
00	2
01	6
02	8
03	5
04	7
05	6
06	3
07	7
08	2
09	5
10	3
11	2
12	2
13	2
14	2
15	2
16	1
17	2

	reports
95	3
96	2
97	3
98	1
99	4
00	2
01	6
02	8
03	5
04	7
05	6
06	3
07	7
08	2
09	5
10	3
11	2
12	2
13	2
14	2
15	2
16	1
17	2