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

Lycoming R680

219 aircraft on the U.S. register carry a Lycoming R680 engine, rated at about 215 horsepower. The Boeing A75 Stearman Kaydet is the model most often fitted with it (69 aircraft). The aircraft carrying it were built between 1927 and 2012.

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 Lycoming R680. FAA spelling: R680.

Fuel: 100LL avgas.

Fitted to model families

Model families, as a table

	aircraft
Boeing A75 Stearman Kaydet	69
Boeing E75 Stearman Kaydet	43
Boeing B75 Stearman Kaydet	17
Boeing PT-13	9
Naval Aircraft Factory N3	8
Stinson VULTEE V-77	8
Stinson JR. S	7
Stinson SM-8	7
Stinson SR-9	6
Curtiss Wright TRAVEL AIR 4000	4
Curtiss Wright TRAVEL AIR E-4000	3
Clark 1000	2

Boeing A75 Stearman Kaydet · Boeing E75 Stearman Kaydet · Boeing B75 Stearman Kaydet · Boeing PT-13 · Naval Aircraft Factory N3 · Stinson VULTEE V-77 · Stinson JR. S · Stinson SM-8 · Stinson SR-9 · Curtiss Wright TRAVEL AIR 4000

Where they are owner's state

California25Texas18Washington14Florida13Delaware10Oregon9Pennsylvania8Ohio8North Carolina8Minnesota6

By state, as a table

	aircraft
California	25
Texas	18
Washington	14
Florida	13
Delaware	10
Oregon	9
Pennsylvania	8
Ohio	8
North Carolina	8
Minnesota	6

Kind of aircraft

Piston singles215 (98%)Piston twins4 (2%)

By kind, as a table

	aircraft	share
Piston singles	215	98%
Piston twins	4	2%

When the aircraft were built by decade

By decade built, as a table

	aircraft
1920	11
1930	31
1940	117
1950	4
1960	1
1970	3
1990	1
2010	2

What the FAA has certified, ordered and been told about the Lycoming R680 the component layer

The design is held under 1 type certificate (ATC 42 Textron Lycoming, held by Textron Lycoming Avco Corporation). The FAA has issued 5 airworthiness directives (orders that owners must comply with) that name this engine series.

FAA orders 5 airworthiness directives · newest first

2012-03-272012-03-07 · Carburetor · engine

2004-06-252004-10-14 · Crankshaft gear · engine

1996-01-2495-26-02 · Aviation Gasoline · engine

1991-05-2890-04-06 R1 · Propeller Governor External Oil Line · engine

1969-01-1666-06-03 · Connecting Rod Assemblies · engine

Approved replacement parts 6 parts manufacturer approvals

Parts a company other than the maker may make for this engine and sell as FAA-approved. The companies holding the most:

Continental Motors INC 3 Petersen Aviation INC 2 Swift Fuels, LLC 1

Most often: magneto sc (2), leaded or (2), tag engine (1), magneto drn (1).

Certificates and bulletins

ATC 42 Textron LycomingType certificate held by Textron Lycoming Avco Corporation · 1 model listed

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 69 with this engine series
Boeing E75 Stearman Kaydet 43 with this engine series
Boeing B75 Stearman Kaydet 17 with this engine series
Boeing PT-13 9 with this engine series
Naval Aircraft Factory N3 8 with this engine series
Stinson VULTEE V-77 8 with this engine series
Stinson JR. S 7 with this engine series
Stinson SM-8 7 with this engine series

Where they are

California 25 of these aircraft
Texas 18 of these aircraft
Washington 14 of these aircraft
Florida 13 of these aircraft
Delaware 10 of these aircraft

Biggest operators

Southern Aircraft Consultancy INC Trustee 3 of these aircraft
Plane Fun INC Tr Trustee 3 of these aircraft
Western Antique Aeroplane & Automobile Museum 2 of these aircraft
Skyhaven Airport INC 2 of these aircraft
Simply Living LLC 2 of these aircraft

Airworthiness

FAA orders naming the Lycoming R680 5 airworthiness directives

Analytics

The whole map of how records connect · these connections as data: /graph/engine/lycoming-r680.json.

Aircraft newest certificates first · 219

Tail no.	Maker and model	Group	Owner and base	Certificate	Registered	Status
N4453	Grumman SCAN TYPE 30	Fixed-wing, multi-engine	Orlando Financial CORP Mount Dora, Florida	Standard	2026-10-30	Valid
N1707M	Boeing E75	Fixed-wing, single engine	Petair INC Wilmington, Delaware	Standard	2026-08-17	Valid
N13822	Stinson JR. SR	Fixed-wing, single engine	Lake Clark Holdings LLC Port Alsworth, Alaska	Standard	2026-08-12	Valid
N45747	Boeing E75	Fixed-wing, single engine	Individual owner Washington	Standard	2026-07-18	Valid
N258Y	Aero Antiques IMIT TRVLAIR R TYPE	Fixed-wing, single engine	Co-owned owner California	Experimental	2026-06-08	Valid
N75263	Boeing A75L300	Fixed-wing, single engine	Co-owned owner Kansas	Standard	2026-06-04	Valid
N933R	Naval Aircraft Factory N3N-3	Fixed-wing, single engine	Individual owner Colorado	Standard	2026-03-09	Valid
N58720	Boeing A75N1(PT17)	Fixed-wing, single engine	International Air Services INC Trustee Carson City, Nevada	Standard	2026-03-06	Valid
N63910	Boeing A75	Fixed-wing, single engine	Co-owned owner California	Standard	2026-02-22	Valid
N74677	Boeing A75N1(PT17)	Fixed-wing, single engine	Southern Aircraft Consultancy INC Trustee Casper, Wyoming	Standard	2026-02-17	Valid
N1943S	Stinson VULTEE V-77	Fixed-wing, single engine	Southern Aircraft Consultancy INC Trustee Casper, Wyoming	Special flight permit	2026-02-06	Valid
N10053	Boeing A75N1	Fixed-wing, single engine	Southern Aircraft Consultancy INC Trustee Casper, Wyoming	Standard	2026-01-23	Valid
N1177	Boeing E75	Fixed-wing, single engine	Kma LLC New Port Richey, Florida	Standard	2026-01-09	Valid
N99268	Boeing E75	Fixed-wing, single engine	Individual owner Minnesota	Standard	2025-12-01	Valid
N68820	Boeing A75N1(PT17)	Fixed-wing, single engine	Putz Aeroplanes LLC Bryan, Texas	Standard	2025-09-15	Valid
N17N	Boeing A75N1(PT17)	Fixed-wing, single engine	Beta Fleet LLC South Burlington, Vermont	Standard	2025-08-27	Valid
N9918	Curtiss Wright TRAVEL AIR E-4000	Fixed-wing, single engine	Individual owner Wisconsin	Restricted	2025-08-27	Valid
N50058	Boeing A75L300	Fixed-wing, single engine	Co-owned owner Kentucky	Standard	2025-08-01	Valid
N57940	Boeing E75N1	Fixed-wing, single engine	Individual owner Florida	Standard	2025-07-23	Valid
N14101	Boeing A75N1(PT17)	Fixed-wing, single engine	Weaver Clifford A East Berlin, Pennsylvania	Standard	2025-07-20	Valid
N52511	Boeing A75N1(PT17)	Fixed-wing, single engine	Co-owned owner Wisconsin	Standard	2025-04-28	Valid
N69991	Boeing B75N1	Fixed-wing, single engine	Jko Aviation LLC Helena, Montana	Standard	2025-03-24	Valid
N64980	Boeing A75N1(PT17)	Fixed-wing, single engine	Individual owner Mississippi	Standard	2025-02-27	Valid
N49700	Boeing A75L3	Fixed-wing, single engine	Individual owner Indiana	Standard	2025-02-09	Valid
N67832	Cessna T-50	Fixed-wing, multi-engine	Individual owner Missouri	Standard	2024-12-14	Valid
N4991T	Boeing PT-13D	Fixed-wing, single engine	Individual owner California	Standard	2024-09-05	Valid
N5726	Fairchild XNQ-1	Fixed-wing, single engine	Hagerstown Aviation Museum INC Hagerstown, Maryland	Experimental	2024-08-31	Valid
N4413D	Boeing PT-13D	Fixed-wing, single engine	December 1944 LLC Las Vegas, Nevada	Standard	2024-08-09	Valid
N69128	Stinson VULTEE V-77	Fixed-wing, single engine	Gullwing Aviation Holdings LLC Lewes, Delaware	Standard	2024-07-01	Valid
N6241D	Boeing B75N1	Fixed-wing, single engine	Individual owner Texas	Standard	2024-06-27	Valid
N10KP	Boeing A75N1(PT17)	Fixed-wing, single engine	Individual owner Florida	Standard	2024-04-24	Valid
N69245	Stinson VULTEE V-77	Fixed-wing, single engine	Individual owner Mississippi	Standard	2024-04-18	Valid
N65731	Boeing A75N1(PT17)	Fixed-wing, single engine	Individual owner Louisiana	Standard	2024-02-21	Valid
N9782H	Boeing B75N1	Fixed-wing, single engine	Dp131 Associates LLC Chester, Virginia	Standard	2024-02-15	Valid
N1349M	Boeing E75N1	Fixed-wing, single engine	Individual owner Georgia	Standard	2024-02-14	Valid
N854RC	Boeing A75N1(PT17)	Fixed-wing, single engine	Kcs LLC Dubuque, Iowa	Standard	2024-02-14	Valid
N469Y	Stinson SM-8A	Fixed-wing, single engine	Individual owner California	Standard	2024-02-01	Valid
N75441	Boeing A75	Fixed-wing, single engine	Individual owner California	Standard	2024-01-22	Valid
N81172	Boeing N2S-5	Fixed-wing, single engine	Qualitair LLC Trustee Michelstadt,	Standard	2023-12-07	Valid
N63378	Boeing A75	Fixed-wing, single engine	Airborne Images INC Encino, California	Standard	2023-10-29	Valid
N75001	Boeing PT-13	Fixed-wing, single engine	Co-owned owner California	Standard	2023-10-24	Valid
N1517	Stinson SM1-B	Fixed-wing, single engine	Rhinebeck Aerodrome Museum Red Hook Ny, New York	Standard	2023-09-29	Valid
N2538B	Consolidated Vultee L-13	Fixed-wing, single engine	Old Aeroplane Company LLC Lake Suzy, Florida	Standard	2023-09-25	Valid
N1067N	Boeing E75	Fixed-wing, single engine	Ruby Begonia LLC Whitefish, Montana	Standard	2023-08-29	Valid
N7025T	Stinson/Shacklette AT-19	Fixed-wing, single engine	Individual owner Kansas	Standard	2023-08-15	Valid
N59463	Boeing A75N1(PT17)	Fixed-wing, single engine	Individual owner Oregon	Restricted	2023-07-05	Valid
N500JV	Boeing A75N1(PT17)	Fixed-wing, single engine	Individual owner Montana	Standard	2023-07-04	Valid
N50685	Boeing E75	Fixed-wing, single engine	Texas Air Museum Slaton, Texas	Standard	2023-06-24	Valid
N52089	Boeing E75	Fixed-wing, single engine	Co-owned owner Florida	Experimental	2023-06-12	Valid
N44874	Naval Aircraft Factory N3N-3	Fixed-wing, single engine	AG Air Squadron Three LLC Saint Joseph, Illinois	Standard	2023-05-04	Valid
N53783	Boeing A75	Fixed-wing, single engine	Individual owner Washington	Standard	2023-05-01	Valid
N68837	Boeing B75N1	Fixed-wing, single engine	Co-owned owner California	Standard	2023-04-20	Valid
N930W	Stinson SM-8A	Fixed-wing, single engine	Green Bird Aviation LLC Phoenix, Arizona	Standard	2023-04-11	Valid
N22D	Boeing A75N1(PT17)	Fixed-wing, single engine	Hotel Charlie LLC Lewes, Delaware	Experimental	2023-04-05	Valid
N55511	Boeing A75N1(PT17)	Fixed-wing, single engine	Hotel Charlie LLC Lewes, Delaware	Standard	2023-04-05	Valid
N914V	Perth Amboy BIRD CK	Fixed-wing, single engine	Newhouse Flying Service INC Fredericksburg, Texas	Experimental	2023-03-23	Valid
N18353	Boeing A75N1(PT17)	Fixed-wing, single engine	Individual owner Massachusetts	Standard	2023-03-16	Valid
N99266	Boeing E75	Fixed-wing, single engine		Standard	2023-02-06	Valid
N7264	Boeing A75J1	Fixed-wing, single engine	Co-owned owner Illinois	Standard	2023-01-20	Valid
N68324	Boeing B75N1	Fixed-wing, single engine		Standard	2022-12-17	Valid
N5053V	Boeing A75N1(PT17)	Fixed-wing, single engine	Tom Vanderpol Memorial Fund Harrison, South Dakota	Standard	2022-11-28	Valid
N46590	Boeing PT-13B	Fixed-wing, single engine	Withheld at owner's request	Standard	2022-10-21	Valid
N5523N	Boeing E75	Fixed-wing, single engine	Individual owner California	Standard	2022-10-17	Valid
N50662	Waco ZKS-7	Fixed-wing, single engine	Individual owner Virginia	Multiple	2022-10-12	Valid
N55939	Stinson VULTEE V-77	Fixed-wing, single engine	Co-owned owner Arizona	Standard	2022-10-01	Valid
N4599N	Boeing E75	Fixed-wing, single engine	Individual owner Colorado	Standard	2022-06-13	Valid
N3242	Curtiss Wright TRAVEL AIR 4000	Fixed-wing, single engine	Ancient and Honorable Aeroplane CO LLC Waban, Massachusetts	Standard	2022-05-13	Valid
N5525N	Boeing E75	Fixed-wing, single engine	Ferrante Aviation INC Vandergrift, Pennsylvania	Standard	2022-02-15	Valid
N43ST	Boeing A75	Fixed-wing, single engine	Individual owner Oklahoma	Standard	2022-01-29	Valid
N680PT	Boeing A75N1	Fixed-wing, single engine	Warbirds LLC Scottsdale, Arizona	Standard	2021-12-22	Valid
N2533	Boeing E75	Fixed-wing, single engine	Martin Aviation INC Santa Ana, California	Standard	2021-11-09	Valid
N713WW	Boeing E75	Fixed-wing, single engine	Individual owner Washington	Standard	2021-10-23	Valid
N69652	Boeing B75N1	Fixed-wing, single engine	Ageless Aviation Dreams Foundation INC Carson City, Nevada	Standard	2021-09-30	Valid
N5176N	Boeing E75	Fixed-wing, single engine	Individual owner Alaska	Standard	2021-09-07	Valid
N496LF	Boeing PT-13D	Fixed-wing, single engine	Newman Brian A Caldwell, Idaho	Standard	2021-07-31	Valid
N87614	Boeing-Cawley PT-17	Fixed-wing, single engine	Individual owner Washington	Standard	2021-07-09	Valid
N68840	Stinson L-5	Fixed-wing, single engine	Federal Aerial Applicators LLC Wilmington, Delaware	Restricted	2021-04-30	Valid
N4587N	Boeing E75	Fixed-wing, single engine	Plane Fun INC Tr Trustee Snellville, Georgia	Standard	2021-04-27	Valid
N718L	Flaglor GEE BEE Y	Fixed-wing, single engine	Individual owner Illinois	Experimental	2021-04-17	Valid
N68253	Boeing A75N1(PT17)	Fixed-wing, single engine	Individual owner Virginia	Standard	2020-11-05	Valid
N317PT	Boeing E75	Fixed-wing, single engine	Baum Group LLC Shavertown, Pennsylvania	Standard	2020-11-03	Valid
N18423	Stinson SR-9C	Fixed-wing, single engine	Co-owned owner Washington	Standard	2020-10-21	Valid
N12164	Stinson JR. S	Fixed-wing, single engine	Individual owner Texas	Standard	2020-09-08	Valid
N482N	Younkin AMATEUR BUILT	Fixed-wing, single engine	Individual owner Arkansas	Experimental	2020-08-19	Valid
N75650	Boeing E75N1	Fixed-wing, single engine	Individual owner Texas	Standard	2020-07-28	Valid
N6478	Curtiss Wright TRAVEL AIR D-4000	Fixed-wing, single engine	Individual owner Arkansas	Standard	2020-07-24	Valid
N18407	Stinson SR-9C	Fixed-wing, single engine	Individual owner Texas	Standard	2020-07-17	Valid
N66740	Boeing A75N1(PT17)	Fixed-wing, single engine	Individual owner Texas	Standard	2020-06-23	Valid
N418M	Stinson SM-8A	Fixed-wing, single engine	Chileprop LLC Mimbres, New Mexico	Standard	2020-06-04	Valid
N9911	Experimental NEYS D260	Fixed-wing, single engine	August Aero LLC Kalispell, Montana	Experimental	2020-05-08	Valid
N51422	Boeing A75L3	Fixed-wing, single engine	Co-owned owner Texas	Standard	2020-05-06	Valid
N58390	Boeing PT-13B	Fixed-wing, single engine	Individual owner North Carolina	Standard	2020-04-02	Valid
N44769	Naval Aircraft Factory N3N-3	Fixed-wing, single engine	Individual owner California	Standard	2020-03-12	Valid
N9018R	Clark 1000	Fixed-wing, single engine	Individual owner California	Restricted	2020-03-02	Valid
N787H	Stearman Aircraft 6L	Fixed-wing, single engine	Cloudboy LLC Bellevue, Washington	Standard	2020-02-26	Valid
N59231	Boeing A75N1(PT17)	Fixed-wing, single engine	Widewings LLC Alexandria, Virginia	Standard	2020-02-04	Valid
N49778	Boeing A75N1(PT17)	Fixed-wing, single engine	Individual owner New Hampshire	Standard	2019-10-25	Valid
N44848	Naval Aircraft Factory N3N-3	Fixed-wing, single engine	Flabob Airport LLC Riverside, California	Standard	2019-09-23	Valid
N64648	Boeing B75N1	Fixed-wing, single engine	Individual owner Ohio	Standard	2019-07-26	Valid
N744S	Boeing PT-13D	Fixed-wing, single engine	Pj Aviation Holding LLC Trustee Eden Prairie, Minnesota	Standard	2019-05-03	Valid

Source: FAA Civil Aviation Registry, Releasable Aircraft Database (the engine reference table and each aircraft's engine code), November 5, 2026. Horsepower and thrust are the FAA's figures for the series, not for a particular aircraft.