Engines · piston (reciprocating) · data as of October 23, 2026

Jacobs L6

59 aircraft on the U.S. register carry a Jacobs L6 engine, rated at about 330 horsepower. The Cessna 195 is the model most often fitted with it (28 aircraft). The aircraft carrying it were built between 1936 and 2005.

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 Jacobs L6. FAA spelling: L6.

Fitted to model families

Cessna 19528Beechcraft F1712Waco AGC-84Waco AVN-83Cessna 1902Waco ZGC-72Beechcraft E172Beech 18D1Beech SE17B1Cook Joe Frank WACO TAPERWING ATO1Waco AQC-61Waco ARE1

Model families, as a table

	aircraft
Cessna 195	28
Beechcraft F17	12
Waco AGC-8	4
Waco AVN-8	3
Cessna 190	2
Waco ZGC-7	2
Beechcraft E17	2
Beech 18D	1
Beech SE17B	1
Cook Joe Frank WACO TAPERWING ATO	1
Waco AQC-6	1
Waco ARE	1

Cessna 195 · Beechcraft F17 · Waco AGC-8 · Waco AVN-8 · Cessna 190 · Waco ZGC-7 · Beechcraft E17 · Beech 18D · Beech SE17B · Cook Joe Frank WACO TAPERWING ATO

Where they are owner's state

California8Missouri7Washington5Pennsylvania3Florida3Texas2Tennessee2Oregon2Ohio2New Hampshire2

By state, as a table

	aircraft
California	8
Missouri	7
Washington	5
Pennsylvania	3
Florida	3
Texas	2
Tennessee	2
Oregon	2
Ohio	2
New Hampshire	2

Kind of aircraft

Piston singles58 (98%)Piston twins1 (2%)

By kind, as a table

	aircraft	share
Piston singles	58	98%
Piston twins	1	2%

When the aircraft were built by decade

By decade built, as a table

	aircraft
1930	22
1940	10
1950	14
2000	1

What the FAA has certified, ordered and been told about the Jacobs L6 the component layer

No FAA order in the current files names this engine series. Operators and repair shops have filed 5 failure reports with the FAA since 1995, 5 of them in the last ten years.

Failure reports 5 since · what operators and shops told the FAA

Failure reports by year, as a table

	reports
02	1
04	3
08	1

Parts most often reported as the reports name them

Hinge Bracket3Bracket1Feeder Cable1

Parts most reported, as a table

	reports
Hinge Bracket	3
Bracket	1
Feeder Cable	1

Latest reports

2008-03-03Feeder Cable: chafed

2004-05-25Hinge Bracket: corroded

2002-05-16Bracket: corroded

Approved replacement parts 10 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:

Air Repair INC 3 Unison Industries (Formerly Slick Aircraft Products) 2 Petersen Aviation INC 2 Barron Aviation LLC 1 Aero-Engines INC 1 Ada Manufacturing 1

Most often: spark plug (2), leaded or (2), throttle shaft (1), shaft (1), rotor (1), intake tube (1), gasket (1), battery timer (1).

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

Cessna 195 28 with this engine series
Beechcraft F17 12 with this engine series
Cessna 190 2 with this engine series
Beechcraft E17 2 with this engine series
Waco ZQC-6 1 with this engine series

Where they are

California 8 of these aircraft
Missouri 7 of these aircraft
Washington 5 of these aircraft
Pennsylvania 3 of these aircraft
Florida 3 of these aircraft

Biggest operators

Barron Aviation LLC 4 of these aircraft
Beechcraft Heritage Museum INC 2 of these aircraft
Qualitair LLC Trustee 1 of these aircraft

Airworthiness

Failure reports on the Jacobs L6 5 reports since 1995

Analytics

The whole map of how records connect · these connections as data: /graph/engine/jacobs-l6.json.

Aircraft newest certificates first · 59

Tail no.	Maker and model	Group	Owner and base	Certificate	Registered	Status
N2626	Beech F17D	Fixed-wing, single engine	Fletcher Flying Service 419 LLC Labelle, Florida	Standard	2026-09-29	Valid
N18781	Beech F17D	Fixed-wing, single engine	Individual owner Illinois	Standard	2026-09-01	Valid
N1538D	Cessna 195	Fixed-wing, single engine	Co-owned owner Arizona	Standard	2026-08-04	Valid
N252BB	Cessna 195A	Fixed-wing, single engine	Individual owner Illinois	Standard	2026-03-12	Valid
N66206	Waco AGC-8	Fixed-wing, single engine	Co-owned owner Ohio	Standard	2025-10-29	Valid
N17742	Waco ZGC-7	Fixed-wing, single engine	Co-owned owner California	Standard	2025-09-02	Valid
N195DS	Cessna 195	Fixed-wing, single engine	Abq421 LLC Los Ranchos, New Mexico	Standard	2025-03-01	Valid
N49301	Beech F17D	Fixed-wing, single engine	Blue Sky Adventures LLC Hanover, Pennsylvania	Standard	2025-03-01	Valid
N2312	Waco AGC-8	Fixed-wing, single engine	Qualitair LLC Trustee Michelstadt,	Standard	2024-07-09	Valid
N6896C	Cessna 195	Fixed-wing, single engine	Individual owner Oklahoma	Standard	2020-10-23	Valid
N195Q	Cessna 195A	Fixed-wing, single engine	Plane Fun INC Tr Trustee Snellville, Georgia	Standard	2020-09-30	Valid
N3170G	Cessna 195A	Fixed-wing, single engine	Individual owner Idaho	Standard	2020-06-17	Valid
N3032B	Cessna 195	Fixed-wing, single engine	Individual owner California	Standard	2020-01-15	Valid
N16203	Waco ZQC-6	Fixed-wing, single engine	Co-owned owner Virginia	Standard	2018-12-21	Valid
N46296	Beech F17D	Fixed-wing, single engine	L G Merriam Equipment LLC Chowchilla, California	Standard	2018-10-15	Valid
N9882A	Cessna 195	Fixed-wing, single engine	Individual owner Alabama	Standard	2018-05-16	Valid
N18577	Beech F17D	Fixed-wing, single engine	Co-owned owner Oregon	Standard	2017-12-08	Valid
N2213	Waco AQC-6	Fixed-wing, single engine	Individual owner Pennsylvania	Standard	2017-01-27	Valid
N4367N	Cessna 195	Fixed-wing, single engine	Individual owner Alaska	Standard	2017-01-26	Valid
N90H	Waco AVN-8	Fixed-wing, single engine	Old Style Aircraft LLC Ellsinore, Missouri	Standard	2017-01-03	Valid
N18555	Beech F17D	Fixed-wing, single engine	Individual owner Louisiana	Standard	2016-10-21	Valid
N3023B	Cessna 195B	Fixed-wing, single engine	Individual owner California	Standard	2016-05-26	Valid
N20953	Waco ARE	Fixed-wing, single engine	Experimental Aircraft Association INC Oshkosh, Wisconsin	Standard	2016-01-13	Valid
N17725	Waco ZGC-7	Fixed-wing, single engine	Co-owned owner Arkansas	Standard	2016-01-08	Valid
N9371A	Cessna 195	Fixed-wing, single engine	Individual owner Texas	Standard	2015-05-29	Valid
N1574D	Cessna 195	Fixed-wing, single engine	Individual owner California	Standard	2014-12-03	Valid
N2663	Beech F17D	Fixed-wing, single engine	Nc2663 INC Wilmington, Delaware	Standard	2014-11-14	Valid
N9324A	Cessna 195A	Fixed-wing, single engine	Individual owner Washington	Standard	2014-10-29	Valid
N195DC	Cessna 195A	Fixed-wing, single engine	Individual owner Florida	Standard	2014-05-07	Valid
N195Y	Cessna 195	Fixed-wing, single engine	Individual owner California	Standard	2014-04-02	Valid
N195G	Cessna 195	Fixed-wing, single engine	Salter Kevin L Garden City, Kansas	Standard	2014-01-07	Valid
N59700	Beech F17D	Fixed-wing, single engine	Individual owner Pennsylvania	Standard	2013-11-26	Valid
N9325A	Cessna 195A	Fixed-wing, single engine	Barron Aviation LLC Perry, Missouri	Standard	2013-11-08	Valid
N285D	Beech F17D	Fixed-wing, single engine	Individual owner Minnesota	Standard	2012-10-16	Valid
N195DT	Cessna 195	Fixed-wing, single engine	Alldredge Aviation Auburn, Washington	Standard	2012-04-14	Valid
N8860N	Cessna 195	Fixed-wing, single engine	Individual owner Louisiana	Standard	2012-03-09	Valid
N9397A	Cessna 195A	Fixed-wing, single engine	Barron Aviation LLC Perry, Missouri	Standard	2010-12-02	Valid
N238Y	Beech F17D	Fixed-wing, single engine	Individual owner Oregon	Standard	2010-04-01	Valid
N50650	Beech E17B	Fixed-wing, single engine	Individual owner Montana	Standard	2008-09-11	Valid
N1570D	Cessna 195A	Fixed-wing, single engine	Individual owner Washington	Standard	2008-07-15	Valid
N4319V	Cessna 195	Fixed-wing, single engine	Individual owner Missouri	Standard	2007-03-28	Valid
N2272	Waco AGC-8	Fixed-wing, single engine	Individual owner Washington	Standard	2005-08-24	Valid
N9399A	Cessna 195	Fixed-wing, single engine	Barron Aviation LLC Perry, Missouri	Standard	2005-08-01	Valid
N9883A	Cessna 195A	Fixed-wing, single engine	Individual owner Missouri	Standard	2005-07-19	Valid
N4344V	Cessna 195	Fixed-wing, single engine	Barron Aviation LLC Perry, Missouri	Standard	2004-03-08	Valid
N19385	Waco AVN-8	Fixed-wing, single engine	Individual owner Florida	Standard	2003-12-08	Valid
N256C	Cook Joe Frank WACO TAPERWING ATO	Fixed-wing, single engine	J & N Endeavors LLC Wilmington, Delaware	Experimental	2002-05-07	Valid
N41663	Beech E17L	Fixed-wing, single engine	Individual owner Washington	Standard	2001-03-02	Valid
N18561	Beech SE17B	Fixed-wing, single engine	Individual owner New Hampshire	Standard	2000-10-12	Valid
N87AZ	Beech 18D	Fixed-wing, multi-engine	Beechcraft Heritage Museum INC Tullahoma, Tennessee	Standard	1997-06-26	Valid
N19361	Waco AVN-8	Fixed-wing, single engine	Individual owner Ohio	Standard	1997-04-09	Valid
N19473	Beech F17D	Fixed-wing, single engine	Individual owner Texas	Standard	1994-01-12	Valid
N9855A	Cessna 195A	Fixed-wing, single engine	Co-owned owner New Hampshire	Standard	1991-01-25	Valid
N4391N	Cessna 195	Fixed-wing, single engine	Roy Rodney e Grand Marais, Minnesota	Standard	1989-12-12	Valid
N20798	Beech F17D	Fixed-wing, single engine	Beechcraft Heritage Museum INC Tullahoma, Tennessee	Standard	1985-07-16	Valid
N1525D	Cessna 190	Fixed-wing, single engine	Individual owner California	Standard	1980-12-08	Valid
N4335V	Cessna 195	Fixed-wing, single engine	Co-owned owner California	Standard	1963-07-15	Valid
N195WL	Cessna 190	Fixed-wing, single engine	Individual owner Michigan	Standard		Pending
N20908	Waco AGC-8	Fixed-wing, single engine	Individual owner Idaho	Standard		Pending

Source: FAA Civil Aviation Registry, Releasable Aircraft Database (the engine reference table and each aircraft's engine code), October 23, 2026. Horsepower and thrust are the FAA's figures for the series, not for a particular aircraft.