Models · Monocoupe · Piston singles · data as of October 23, 2026

Monocoupe 90

63 on the U.S. register across 5 versions the FAA records separately. Built from 1930 to 1949; half of them date from 1936 or earlier. Louisiana has the most (8). 30% are registered to companies, flight schools, clubs and other organisations; the rest to individuals, who are not named here at this time.

About the 90 from the FAA's model table

Type: Fixed-wing, single engine · Piston singles
Power: Piston (reciprocating), 1 engine
Common engines: Lambert R266 (30), Lycoming 0-290 Series (9), Warner Ss40&50 (6)
Seats: 2
Cruise speed: about 75 mph
Built of: steel tube, wood and fabric · A steel-tube fuselage and wooden wings under fabric.
Maker on the register: Monocoupe
Registered: earliest certificate January 5, 1968; newest February 25, 2026

Where they are owner's state

Louisiana8California5New York4North Carolina4Missouri4Wisconsin3Texas3Pennsylvania3Oklahoma3Illinois3Florida3Oregon2

By state, as a table

	aircraft
Louisiana	8
California	5
New York	4
North Carolina	4
Missouri	4
Wisconsin	3
Texas	3
Pennsylvania	3
Oklahoma	3
Illinois	3
Florida	3
Oregon	2

Who owns them registrant type

Individual41 (65%)Corporation9 (14%)LLC6 (10%)Partnership4 (6%)Co-owned3 (5%)

By owner type, as a table

	aircraft	share
Individual	41	65%
Corporation	9	14%
LLC	6	10%
Partnership	4	6%
Co-owned	3	5%

Versions as the FAA records them · click one to list only those aircraft

Version	Registered	Built	Share
90A	41	1930 to 1941	65.1%
90	11	1930 to 1940	17.5%
90AL-115	6	1941 to 1949	9.5%
90AF	4	1940 to 1945	6.3%
90AF-100	1	—	1.6%

When they were built by decade · 13 with no year on file

By decade built, as a table

	aircraft
1930	36
1940	14

Registrations by year certificates issued since 2010, including changes of owner · 2026 is the year so far

Registrations by year, as a table

	aircraft
2011	1
2013	3
2014	4
2015	2
2016	4
2017	3
2018	3
2019	7
2020	3
2021	3
2022	2
2023	1
2024	5
2025	3
2026	2

Registration status

Valid61 (97%)Sale reported2 (3%)

By status, as a table

	aircraft	share
Valid	61	97%
Sale reported	2	3%

Airworthiness certificate class

Standard53 (84%)None on file7 (11%)Experimental3 (5%)

By airworthiness certificate, as a table

	aircraft	share
Standard	53	84%
None on file	7	11%
Experimental	3	5%

Biggest operators companies, schools and clubs

Rhinebeck Aerodrome Museum2Western Antique Aeroplane & Automobile Museum1Southern Aircraft Consultancy INC Trustee1Slack Jonathan D1Sitta Donald C1Schell Samuel e JR1Reese Flying Service INC1Ready Aim Flyer LLC1Old Style Aircraft LLC1Horizon Aviation1Historic Aircraft Restoration Museum1Golden Age Air Museum1

Largest fleets, as a table

	aircraft
Rhinebeck Aerodrome Museum	2
Western Antique Aeroplane & Automobile Museum	1
Southern Aircraft Consultancy INC Trustee	1
Slack Jonathan D	1
Sitta Donald C	1
Schell Samuel e JR	1
Reese Flying Service INC	1
Ready Aim Flyer LLC	1
Old Style Aircraft LLC	1
Horizon Aviation	1
Historic Aircraft Restoration Museum	1
Golden Age Air Museum	1

Fleet pages: Rhinebeck Aerodrome Museum · Western Antique Aeroplane & Automobile Museum · Southern Aircraft Consultancy INC Trustee · Slack Jonathan D · Ready Aim Flyer LLC · Old Style Aircraft LLC · Historic Aircraft Restoration Museum · Golden Age Air Museum

Accident history NTSB records · 3 cases since 1982, 1 fatal

2023-10-14ERA24LA009 · 90AL-115 N87621 · accident near Myakka City, FL · minor injuries

2017-05-13CEN17WA189 · 90AF CFJGA · accident near Plattsville · 1 killed

2000-07-25CHI00LA216 · 90A N19429 · accident near Creve Coeur, MO · no injuries

The 3 most recent of 3 cases where the NTSB's make and model match this family's versions. Each aircraft's own page also shows its record. How this model compares with others, with the fleet taken into account: Accidents by model in Aviation Analytics.

Questions people ask answers refresh every morning

How many Monocoupe 90 aircraft are registered in the U.S.?

63 as of October 23, 2026, counting 5 versions the FAA records separately.

Which state has the most Monocoupe 90s?

Louisiana, with 8.

Who owns the Monocoupe 90?

30% are registered to companies, flight schools, clubs and other organisations; the rest to individuals and co-owners, who are not named on this site at this time.

When were the Monocoupe 90s on the register built?

Between 1930 and 1949; half of them in 1936 or earlier.

How many Monocoupe 90 accidents has the NTSB recorded?

3 accidents and incidents since 1982, 1 of them fatal. A model flown more shows more; the accident analytics compare models per thousand registered.

What is the Monocoupe 90 made of?

What the FAA has certified, ordered and been told about the Monocoupe 90 the component layer

A welded steel-tube fuselage and wooden wings, all covered in fabric: the construction of the 1930s and 1940s, which makes wood rot and fabric age the inspection items. A steel-tube fuselage and wooden wings under fabric. The design is held under 1 type certificate (A-306, held by Monocoupe Corporation). No FAA order in the current files names this model. Operators and repair shops have filed 1 failure report with the FAA since 2011, 1 of them in the last ten years: about 1.6 a year for every 100 aircraft on the register; the system most often named is airframe structure. 24 approved modifications exist for it, the most by Uavionix Corporation.

Failure reports 1 since 2011 · what operators and shops told the FAA

Failure reports by year, as a table

	reports
11	1

By system

Airframe structure1 (100%)

Failure reports by system, as a table

	reports	share
Airframe structure	1	100%

Parts most often reported as the reports name them

Spar1

Parts most reported, as a table

	reports
Spar	1

Latest reports

2011-03-04Spar: deteriorated · airframe structure

Approved replacement parts 17 parts manufacturer approvals

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

Mono Aircraft INC 6 Aar Distribution 4 Swift Fuels, LLC 2 Aviation Products Systems INC 2 Uavionix Corporation 1 Dynon Avionics, INC. 1 Aeroleds LLC 1

Most often: fabric (3), type narrow (1), system ii (1), strut stiffener (1), standard system (1), skyview hdx (1), pulley bracket (1), gas tank (1), fulcrum control (1), fuel quantity (1).

Approved modifications 24 supplemental type certificates

Changes the FAA has approved for this design, from new avionics and engines to floats and parachutes. The companies holding the most:

Uavionix Corporation 2 Swift Fuels LLC 2 Champion Aerospace LLC 2 Aviation Products Systems INC. 2 Unison Industires 1 Smith Murlin Gene 1 Shady Aviation LLC 1 Razorback Fabrics INC 1

Latest

2026-07-14SA04652CH · To allow use of 100R grade aviation fuel meeting Swift Fuel, LLC specification

2025-05-27SA00081NY · Installation of Iceman Aviation Supplies, Inc. Carburetor Ice Detector.

2025-03-01SA7965SW · Application of fabric and polyurethane finishing system.

2024-09-26SA02594SE · SkyView HDX Instrumentation and Autopilot System manufactured

2024-08-21SA01757WI · To allow the use of UL91 or UL94 (minimum) grade aviation fuel

Certificates and bulletins

A-306Type certificate held by Monocoupe Corporation · 5 models listed · revised October 25, 2011

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 the 90 links to the rest of the register

Design

Monocoupe 93 aircraft on the register
Monocoupe 90A 41 registered
Monocoupe 90 11 registered
Monocoupe 90AL-115 6 registered
Monocoupe 90AF 4 registered
Monocoupe 90AF-100 1 registered
Built of steel tube, wood and fabric · A steel-tube fuselage and wooden wings under fabric.

Engines

Lambert R266 30 of these aircraft · 90 hp
Lycoming O-290 series 9 of these aircraft · 140 hp
Warner SS40&50 6 of these aircraft · 90 hp
Lycoming O-320 series 4 of these aircraft · 180 hp
Lycoming IO-320 series 2 of these aircraft · 150 hp

Where they are

Louisiana 8 of these aircraft
California 5 of these aircraft
New York 4 of these aircraft
North Carolina 4 of these aircraft
Missouri 4 of these aircraft

Biggest operators

Rhinebeck Aerodrome Museum 2 of these aircraft
Western Antique Aeroplane & Automobile Museum 1 of these aircraft
Southern Aircraft Consultancy INC Trustee 1 of these aircraft
Slack Jonathan D 1 of these aircraft
Sitta Donald C 1 of these aircraft

Record

NTSB accidents and incidents involving the 90 3 cases since 1982 · 1 fatal

Airworthiness

Failure reports filed on the 90 1 reports since 1995
Approved modifications for the 90 24 supplemental type certificates

Analytics

The whole map of how records connect · these connections as data: /graph/model/monocoupe/90.json.

Aircraft newest certificates first · 63

Tail no.	Maker and model	Owner and base	Certificate	Registered	Status
N15437	Monocoupe 90A	Individual owner Illinois	Standard	2026-02-25	Valid
N538W	Monocoupe 90	Southern Aircraft Consultancy INC Trustee Casper, Wyoming	None on file	2026-02-14	Valid
N38917	Monocoupe 90A	Flying Low Racing LLC Oklahoma City, Oklahoma	Standard	2025-10-23	Valid
N11783	Monocoupe 90A	Individual owner Louisiana	Standard	2025-03-02	Valid
N15440	Monocoupe 90A	Caldwell Collection INC Oklahoma City, Oklahoma	Standard	2025-02-10	Valid
N19438	Monocoupe 90	Individual owner North Carolina	None on file	2024-08-14	Valid
N557W	Monocoupe 90	Individual owner Florida	Standard	2024-07-27	Valid
N55708	Monocoupe 90AF-100	Individual owner Louisiana	None on file	2024-05-08	Valid
N11793	Monocoupe 90A	Individual owner Ohio	Standard	2024-04-19	Valid
N18186	Monocoupe 90A	Individual owner Washington	Standard	2024-04-10	Valid
N11760	Monocoupe 90A	Individual owner Texas	Standard	2023-09-14	Valid
N11776	Monocoupe 90A	Individual owner California	Standard	2022-12-17	Valid
N87621	Monocoupe 90AL-115	Individual owner Florida	Standard	2022-07-30	Valid
N15429	Monocoupe 90A	Individual owner Wisconsin	Experimental	2021-08-20	Valid
N18056	Monocoupe 90A	Individual owner Illinois	Standard	2021-08-09	Valid
N97Y	Monocoupe 90AL-115	Individual owner Missouri	Standard	2021-03-30	Valid
N369H	Monocoupe 90AL-115	Old Style Aircraft LLC Ellsinore, Missouri	Standard	2020-11-17	Valid
N176K	Monocoupe 90	Individual owner Alaska	None on file	2020-10-27	Valid
N12361	Monocoupe 90	Individual owner Texas	Standard	2020-02-26	Valid
N18168	Monocoupe 90A	Individual owner New York	Standard	2019-12-20	Valid
N11768	Monocoupe 90A	Individual owner New York	Standard	2019-12-18	Valid
N19430	Monocoupe 90A	Individual owner Florida	Standard	2019-12-17	Valid
N38905	Monocoupe 90AL-115	Individual owner Ohio	Standard	2019-11-15	Valid
N11767	Monocoupe 90A	Art Ticulate Tees LLC Hazard, Kentucky	Standard	2019-10-03	Valid
N116V	Monocoupe 90	Rhinebeck Aerodrome Museum Rhinebeck, New York	Standard	2019-08-29	Valid
N19434	Monocoupe 90A	Bill Mcgowan INC Covington, Louisiana	Standard	2019-07-10	Valid
N18176	Monocoupe 90A	Reese Flying Service INC Muncie, Indiana	Standard	2018-11-27	Valid
N16423	Monocoupe 90A	Individual owner Wisconsin	None on file	2018-05-09	Valid
N18166	Monocoupe 90A	Western Antique Aeroplane & Automobile Museum Hood River, Oregon	Standard	2018-01-08	Valid
N537W	Monocoupe 90	Command Aire LLC Sitka, Alaska	Standard	2017-05-19	Valid
N52271	Monocoupe 90AF	Horizon Aviation Seneca, Pennsylvania	Standard	2017-05-08	Valid
N2701C	Monocoupe 90A	Co-owned owner Missouri	Experimental	2017-03-23	Valid
N11747	Monocoupe 90A	Co-owned owner North Carolina	Standard	2016-09-01	Valid
N520W	Monocoupe 90	Individual owner California	Standard	2016-08-18	Valid
N11754	Monocoupe 90A	Individual owner Oregon	Standard	2016-05-04	Valid
N11761	Monocoupe 90A	Co-owned owner North Carolina	Standard	2016-03-04	Valid
N38922	Monocoupe 90AL-115	Individual owner California	Standard	2015-05-27	Valid
N15427	Monocoupe 90A	Individual owner Tennessee	Standard	2015-03-13	Valid
N19423	Monocoupe 90A	Individual owner Arizona	Standard	2014-09-17	Valid
N11782	Monocoupe 90A	Individual owner California	Standard	2014-05-27	Valid
N38910	Monocoupe 90AF	Sitta Donald C Farmington, New Mexico	Standard	2014-04-30	Valid
N119V	Monocoupe 90	Historic Aircraft Restoration Museum Saint Louis, Missouri	Standard	2014-04-28	Valid
N429N	Monocoupe 90	Rhinebeck Aerodrome Museum Rhinebeck, New York	Standard	2013-10-17	Valid
N18062	Monocoupe 90A	Slack Jonathan D Bonfield, Illinois	Standard	2013-07-18	Valid
N11795	Monocoupe 90A	Individual owner California	Experimental	2013-01-30	Valid
N11737	Monocoupe 90A	Individual owner Utah	None on file	2011-06-14	Valid
N87618	Monocoupe 90AL-115	Ready Aim Flyer LLC New Castle, Delaware	Standard	2008-12-18	Valid
N11751	Monocoupe 90A	Individual owner Georgia	Standard	2008-10-06	Valid
N19424	Monocoupe 90A	Individual owner Texas	Standard	2007-11-29	Valid
N16426	Monocoupe 90A	Crestair Air LLC Dover, Delaware	Standard	2007-09-05	Valid
N18192	Monocoupe 90AF	Individual owner Massachusetts	Standard	2005-07-28	Valid
N11750	Monocoupe 90A	Golden Age Air Museum Bethel, Pennsylvania	Standard	2003-07-22	Valid
N19433	Monocoupe 90A	Schell Samuel e JR Littlestown, Pennsylvania	Standard	2002-03-07	Valid
N410Y	Monocoupe 90A	Individual owner North Carolina	Standard	1990-04-24	Valid
N11735	Monocoupe 90A	Individual owner North Dakota	Standard	1989-10-17	Valid
N543W	Monocoupe 90	Individual owner Virginia	Standard	1989-04-17	Valid
N19437	Monocoupe 90A	Individual owner Louisiana	None on file	1987-12-10	Valid
N11777	Monocoupe 90A	Individual owner Louisiana	Standard	1987-12-07	Valid
N11797	Monocoupe 90A	Individual owner Louisiana	Standard	1987-12-07	Valid
N18184	Monocoupe 90A	Individual owner Louisiana	Standard	1971-04-23	Valid
N16427	Monocoupe 90A	Individual owner Louisiana	Standard	1968-01-05	Valid
N11787	Monocoupe 90A	Individual owner Wisconsin	Standard		Sale reported
N18195	Monocoupe 90AF	Individual owner Oklahoma	Standard		Sale reported