The U.S. aircraft register, updated daily
Engines · piston (reciprocating) · data as of October 5, 2026

Lycoming O-360-A1H6

106 aircraft on the U.S. register carry a Lycoming O-360-A1H6 engine, rated at about 180 horsepower. The Piper PA-44 Seminole is the model most often fitted with it (103 aircraft). The aircraft carrying it were built between 1996 and 2024.

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 O-360-A1H6. FAA spelling: O-360-A1H6.

Fitted to model families

Piper PA-44 Seminole103Aviat Inc A-11Michael G Darby DARD 11Ryan Evans RV7-A1

Piper PA-44 Seminole · Aviat Inc A-1 · Michael G Darby DARD 1 · Ryan Evans RV7-A

Where they are owner's state

Delaware45Florida15North Dakota8Virginia5Texas5Arizona5Minnesota3Illinois3Washington2South Dakota2

Kind of aircraft

Piston twins103 (97%)Piston singles3 (3%)

When the aircraft were built by decade

0193858772199021200077201042020

What the FAA has certified, ordered and been told about the Lycoming O-360-A1H6 the component layer

No FAA order in the current files names this engine series. Operators and repair shops have filed 169 failure reports with the FAA since 1995, 127 of them in the last ten years.

Failure reports 169 since · what operators and shops told the FAA

01019283807131823224

Parts most often reported as the reports name them

Angle12Stop11Doubler9Rib9Downlock Switch6Impulse Coupling6Pump6Pushrod6Plate5Spar5

Latest reports

2024-10-03Muffler: cracked
2024-03-13Muffler: cracked
2023-09-25Rivet: loose
2023-04-07Impulse Coupling: loose
2023-03-16Impulse Coupling: 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
Where they are
Biggest operators
Airworthiness

These connections as data: /graph/engine/lycoming-o-360-a1h6.json · about the eFlight graph.

Aircraft newest certificates first · 106

Tail no.Maker and modelGroupOwner and baseCertificateRegisteredStatus
N278AG Piper
PA-44-180
Fixed-wing, multi-engine Epic Aviation INC
New Smyrna Beach, Florida
Standard 2026-04-03 ValidFAA registration status code V: Valid registration. All codes
N256AA Piper Aircraft Inc
PA-44-180
Fixed-wing, multi-engine Alf Ix LLC
Chicago, Illinois
Standard 2026-01-04 ValidFAA registration status code V: Valid registration. All codes
N4405J Piper Aircraft Inc
PA-44-180
Fixed-wing, multi-engine Cae Aviation Academy Phoenix LLC
Mesa, Arizona
Standard 2025-10-08 ValidFAA registration status code V: Valid registration. All codes
N4405N Piper Aircraft Inc
PA-44-180
Fixed-wing, multi-engine Cae Aviation Academy Phoenix LLC
Mesa, Arizona
Standard 2025-10-08 ValidFAA registration status code V: Valid registration. All codes
N687ND Piper
PA-44-180
Fixed-wing, multi-engine Ascent Aviation INC
Duluth, Minnesota
Standard 2025-10-08 ValidFAA registration status code V: Valid registration. All codes
N4405E Piper Aircraft Inc
PA-44-180
Fixed-wing, multi-engine Cae Aviation Academy Phoenix LLC
Mesa, Arizona
Standard 2025-10-07 ValidFAA registration status code V: Valid registration. All codes
N4405K Piper Aircraft Inc
PA-44-180
Fixed-wing, multi-engine Cae Aviation Academy Phoenix LLC
Mesa, Arizona
Standard 2025-10-06 ValidFAA registration status code V: Valid registration. All codes
N4405Q Piper Aircraft Inc
PA-44-180
Fixed-wing, multi-engine Cae Aviation Academy Phoenix LLC
Mesa, Arizona
Standard 2025-10-06 ValidFAA registration status code V: Valid registration. All codes
N696AK Michael G Darby
DARD 1
Fixed-wing, single engine Sloans Aircraft Welding LLC
Anchorage, Alaska
Experimental 2025-02-15 ValidFAA registration status code V: Valid registration. All codes
N436SC Piper
PA-44-180
Fixed-wing, multi-engine Ab Prop Plane I LLC
Metairie, Louisiana
Standard 2025-01-14 ValidFAA registration status code V: Valid registration. All codes
N437SC Piper
PA-44-180
Fixed-wing, multi-engine Ab Prop Plane I LLC
Metairie, Louisiana
Standard 2025-01-14 ValidFAA registration status code V: Valid registration. All codes
N2440D Piper Aircraft Inc
PA-44-180
Fixed-wing, multi-engine Xing Kong Aviation Service LLC
Atwater, California
Standard 2024-10-09 ValidFAA registration status code V: Valid registration. All codes
N327RV Ryan Evans
RV7-A
Fixed-wing, single engine Individual owner
North Dakota
Experimental 2024-03-28 ValidFAA registration status code V: Valid registration. All codes
N782ND Piper
PA-44-180
Fixed-wing, multi-engine Fox Leasing Group LLC
Hollywood, Florida
Standard 2023-10-14 ValidFAA registration status code V: Valid registration. All codes
N783ND Piper
PA-44-180
Fixed-wing, multi-engine Vertol Systems Company INC
Destin, Florida
Standard 2023-09-08 ValidFAA registration status code V: Valid registration. All codes
N267AA Piper
PA-44-180
Fixed-wing, multi-engine Wings Over Texas Holdings LLC
Denton, Texas
Standard 2023-08-29 ValidFAA registration status code V: Valid registration. All codes
N884FT Piper Aircraft Inc
PA-44-180
Fixed-wing, multi-engine Florida Institute of Technology
Melbourne, Florida
Standard 2023-08-21 ValidFAA registration status code V: Valid registration. All codes
N697ND Piper
PA-44-180
Fixed-wing, multi-engine South Dakota State University
Brookings, South Dakota
Standard 2023-06-07 ValidFAA registration status code V: Valid registration. All codes
N695ND Piper
PA-44-180
Fixed-wing, multi-engine Fly Gateway Aviation Institute
New Castle, Delaware
Standard 2023-03-03 ValidFAA registration status code V: Valid registration. All codes
N781ND Piper Aircraft Inc
PA-44-180
Fixed-wing, multi-engine Rainier Flight Service LLC
Renton, Washington
Standard 2023-02-17 ValidFAA registration status code V: Valid registration. All codes
N598ND Piper Aircraft Inc
PA-44-180
Fixed-wing, multi-engine Bremfour Aviation Group INC
Wilmington, Delaware
Standard 2022-11-26 ValidFAA registration status code V: Valid registration. All codes
N4438T Piper Aircraft Inc
PA-44-180
Fixed-wing, multi-engine Alf Ix LLC
Chicago, Illinois
Standard 2022-11-03 ValidFAA registration status code V: Valid registration. All codes
N4438U Piper
PA-44-180
Fixed-wing, multi-engine Alf Ix LLC
Chicago, Illinois
Standard 2022-11-03 ValidFAA registration status code V: Valid registration. All codes
N279AG Piper Aircraft Inc
PA-44-180
Fixed-wing, multi-engine Wings Over Texas Holdings LLC
Denton, Texas
Standard 2022-10-24 ValidFAA registration status code V: Valid registration. All codes
N280AG Piper
PA-44-180
Fixed-wing, multi-engine Wings Over Texas Holdings LLC
Denton, Texas
Standard 2022-10-24 ValidFAA registration status code V: Valid registration. All codes
N593ND Piper
PA-44-180
Fixed-wing, multi-engine Christiansen Aviation LLC
Wilmington, Delaware
Standard 2022-08-30 ValidFAA registration status code V: Valid registration. All codes
N595ND Piper Aircraft Inc
PA-44-180
Fixed-wing, multi-engine Christiansen Aviation LLC
Wilmington, Delaware
Standard 2022-08-30 ValidFAA registration status code V: Valid registration. All codes
N220FL Piper Aircraft Inc
PA-44-180
Fixed-wing, multi-engine Christiansen Aviation LLC
Wilmington, Delaware
Standard 2022-08-23 ValidFAA registration status code V: Valid registration. All codes
N2369X Piper Aircraft Inc
PA-44-180
Fixed-wing, multi-engine Christiansen Aviation LLC
Wilmington, Delaware
Standard 2022-08-23 ValidFAA registration status code V: Valid registration. All codes
N7122E Piper Aircraft Inc
PA-44-180
Fixed-wing, multi-engine Christiansen Aviation LLC
Wilmington, Delaware
Standard 2022-08-18 ValidFAA registration status code V: Valid registration. All codes
N583ND Piper Aircraft Inc
PA-44-180
Fixed-wing, multi-engine Christiansen Aviation LLC
Wilmington, Delaware
Standard 2022-08-16 ValidFAA registration status code V: Valid registration. All codes
N590ND Piper
PA-44-180
Fixed-wing, multi-engine Christiansen Aviation LLC
Wilmington, Delaware
Standard 2022-08-16 ValidFAA registration status code V: Valid registration. All codes
N580ND Piper Aircraft Inc
PA-44-180
Fixed-wing, multi-engine Christiansen Aviation LLC
Wilmington, Delaware
Standard 2022-08-15 ValidFAA registration status code V: Valid registration. All codes
N581ND Piper
PA-44-180
Fixed-wing, multi-engine Christiansen Aviation LLC
Wilmington, Delaware
Standard 2022-08-15 ValidFAA registration status code V: Valid registration. All codes
N210FL Piper Aircraft Inc
PA-44-180
Fixed-wing, multi-engine Christiansen Aviation LLC
Wilmington, Delaware
Standard 2022-08-04 ValidFAA registration status code V: Valid registration. All codes
N30608 Piper
PA-44-180
Fixed-wing, multi-engine Christiansen Aviation LLC
Wilmington, Delaware
Standard 2022-08-04 ValidFAA registration status code V: Valid registration. All codes
N442RM Piper Aircraft Inc
PA-44-180
Fixed-wing, multi-engine Rocky Mountain College
Billings, Montana
Standard 2021-10-25 ValidFAA registration status code V: Valid registration. All codes
N680ND Piper
PA-44-180
Fixed-wing, multi-engine Medary Aviation LLC
Brookings, South Dakota
Standard 2021-10-21 ValidFAA registration status code V: Valid registration. All codes
N596ND Piper Aircraft Inc
PA-44-180
Fixed-wing, multi-engine Silverhawk Aviation Academy LLC
Caldwell, Idaho
Standard 2020-12-19 ValidFAA registration status code V: Valid registration. All codes
N565RB Piper Aircraft Inc
PA-44-180
Fixed-wing, multi-engine Eastern Kentucky University
Richmond, Kentucky
Standard 2020-08-27 ValidFAA registration status code V: Valid registration. All codes
N8045N Piper Aircraft Inc
PA-44-180
Fixed-wing, multi-engine Cti Aircraft Leasing LLC
Memphis, Tennessee
Standard 2020-02-10 ValidFAA registration status code V: Valid registration. All codes
N814AT Piper Aircraft Inc
PA-44-180
Fixed-wing, multi-engine Dot Aviation LLC
Wilmington, Delaware
Standard 2020-01-27 ValidFAA registration status code V: Valid registration. All codes
N219EP Piper Aircraft Inc
PA-44-180
Fixed-wing, multi-engine Epic Aviation INC
New Smyrna, Florida
Standard 2019-04-02 ValidFAA registration status code V: Valid registration. All codes
N785LU Piper Aircraft Inc
PA-44-180
Fixed-wing, multi-engine Liberty University
Lynchburg, Virginia
Standard 2018-09-12 ValidFAA registration status code V: Valid registration. All codes
N934LT Piper Aircraft Inc
PA-44-180
Fixed-wing, multi-engine Aerosim Flight Academy
Sanford, Florida
Standard 2018-08-20 ValidFAA registration status code V: Valid registration. All codes
N935LT Piper Aircraft Inc
PA-44-180
Fixed-wing, multi-engine Aerosim Flight Academy
Sanford, Florida
Standard 2018-08-20 ValidFAA registration status code V: Valid registration. All codes
N936LT Piper
PA-44-180
Fixed-wing, multi-engine Aerosim Flight Academy
Sanford, Florida
Standard 2018-08-20 ValidFAA registration status code V: Valid registration. All codes
N937LT Piper
PA-44-180
Fixed-wing, multi-engine Aerosim Flight Academy
Sanford, Florida
Standard 2018-08-20 ValidFAA registration status code V: Valid registration. All codes
N938LT Piper
PA-44-180
Fixed-wing, multi-engine Aerosim Flight Academy
Sanford, Florida
Standard 2018-08-20 ValidFAA registration status code V: Valid registration. All codes
N49370 Aviat Inc
A-1
Fixed-wing, single engine Co-owned owner
Nevada
Experimental 2018-06-19 ValidFAA registration status code V: Valid registration. All codes
N933LT Piper Aircraft Inc
PA-44-180
Fixed-wing, multi-engine Aerosim Flight Academy
Sanford, Florida
Standard 2018-04-23 ValidFAA registration status code V: Valid registration. All codes
N999NF Piper
PA-44-180
Fixed-wing, multi-engine Coast Flight Training and Management INC
San Diego, California
Standard 2018-04-12 ValidFAA registration status code V: Valid registration. All codes
N930LT Piper Aircraft Inc
PA-44-180
Fixed-wing, multi-engine Aerosim Flight Academy
Sanford, Florida
Standard 2018-03-22 ValidFAA registration status code V: Valid registration. All codes
N931LT Piper Aircraft Inc
PA-44-180
Fixed-wing, multi-engine Aerosim Flight Academy
Sanford, Florida
Standard 2018-03-22 ValidFAA registration status code V: Valid registration. All codes
N932LT Piper
PA-44-180
Fixed-wing, multi-engine Aerosim Flight Academy
Sanford, Florida
Standard 2018-03-22 ValidFAA registration status code V: Valid registration. All codes
N47LU Piper
PA-44-180
Fixed-wing, multi-engine Letourneau University
Longview, Texas
Standard 2018-01-11 ValidFAA registration status code V: Valid registration. All codes
N46LU Piper
PA-44-180
Fixed-wing, multi-engine Letourneau University
Longview, Texas
Standard 2018-01-04 ValidFAA registration status code V: Valid registration. All codes
N255TJ Piper
PA-44-180
Fixed-wing, multi-engine Volar II LLC
Edmond, Oklahoma
Standard 2017-11-30 ValidFAA registration status code V: Valid registration. All codes
N720SU Piper Aircraft Inc
PA-44-180
Fixed-wing, multi-engine Oklahoma State University
Stillwater, Oklahoma
Standard 2017-11-06 ValidFAA registration status code V: Valid registration. All codes
N792ND Piper
PA-44-180
Fixed-wing, multi-engine Und Aerospace Foundation
Grand Forks, North Dakota
Standard 2017-08-31 ValidFAA registration status code V: Valid registration. All codes
N793ND Piper
PA-44-180
Fixed-wing, multi-engine Und Aerospace Foundation
Grand Forks, North Dakota
Standard 2017-08-15 ValidFAA registration status code V: Valid registration. All codes
N791ND Piper
PA-44-180
Fixed-wing, multi-engine Und Aerospace Foundation
Grand Forks, North Dakota
Standard 2017-07-18 ValidFAA registration status code V: Valid registration. All codes
N790ND Piper
PA-44-180
Fixed-wing, multi-engine Und Aerospace Foundation
Grand Forks, North Dakota
Standard 2017-07-17 ValidFAA registration status code V: Valid registration. All codes
N417EP Piper Aircraft Inc
PA-44-180
Fixed-wing, multi-engine Epic Aviation INC
New Smyrna, Florida
Standard 2017-04-20 ValidFAA registration status code V: Valid registration. All codes
N443MG Piper Aircraft Inc
PA-44-180
Fixed-wing, multi-engine Georgia Aviation Authority
Eastman, Georgia
Standard 2017-04-06 ValidFAA registration status code V: Valid registration. All codes
N785ND Piper
PA-44-180
Fixed-wing, multi-engine Und Aerospace Foundation
Grand Forks, North Dakota
Standard 2017-03-15 ValidFAA registration status code V: Valid registration. All codes
N784LU Piper
PA-44-180
Fixed-wing, multi-engine Liberty University School of Aeronautics
Lynchburg, Virginia
Standard 2017-03-09 ValidFAA registration status code V: Valid registration. All codes
N783LU Piper
PA-44-180
Fixed-wing, multi-engine Liberty University School of Aeronautics
Lynchburg, Virginia
Standard 2015-12-05 ValidFAA registration status code V: Valid registration. All codes
N443MK Piper
PA-44-180
Fixed-wing, multi-engine North Star Aviation
Mankato, Minnesota
Standard 2015-12-03 ValidFAA registration status code V: Valid registration. All codes
N445MK Piper
PA-44-180
Fixed-wing, multi-engine North Star Aviation
Mankato, Minnesota
Standard 2015-12-02 ValidFAA registration status code V: Valid registration. All codes
N782LU Piper
PA-44-180
Fixed-wing, multi-engine Liberty University School of Aeronautics
Lynchburg, Virginia
Standard 2015-01-08 ValidFAA registration status code V: Valid registration. All codes
N781LU Piper
PA-44-180
Fixed-wing, multi-engine Liberty University School of Aeronautics
Lynchburg, Virginia
Light sport 2015-01-05 ValidFAA registration status code V: Valid registration. All codes
N688ND Piper Aircraft Inc
PA-44-180
Fixed-wing, multi-engine Und Aerospace Foundation
Grand Forks, North Dakota
Standard 2014-12-03 ValidFAA registration status code V: Valid registration. All codes
N689ND Piper
PA-44-180
Fixed-wing, multi-engine Und Aerospace Foundation
Grand Forks, North Dakota
Standard 2014-12-03 ValidFAA registration status code V: Valid registration. All codes
N810AT Piper
PA-44-180
Fixed-wing, multi-engine Dot Aviation LLC
Wilmington, Delaware
Standard 2014-08-27 ValidFAA registration status code V: Valid registration. All codes
N811AT Piper
PA-44-180
Fixed-wing, multi-engine Dot Aviation LLC
Wilmington, Delaware
Standard 2014-08-27 ValidFAA registration status code V: Valid registration. All codes
N806AT Piper
PA-44-180
Fixed-wing, multi-engine Flight School of Texas LLC
Wilmington, Delaware
Standard 2013-05-07 ValidFAA registration status code V: Valid registration. All codes
N805AT Piper
PA-44-180
Fixed-wing, multi-engine Flight School of Texas LLC
Wilmington, Delaware
Standard 2013-04-05 ValidFAA registration status code V: Valid registration. All codes
N803AT Piper
PA-44-180
Fixed-wing, multi-engine Flight School of Texas LLC
Wilmington, Delaware
Standard 2013-02-28 ValidFAA registration status code V: Valid registration. All codes
N804AT Piper
PA-44-180
Fixed-wing, multi-engine Flight School of Texas LLC
Wilmington, Delaware
Standard 2013-02-28 ValidFAA registration status code V: Valid registration. All codes
N802AT Piper
PA-44-180
Fixed-wing, multi-engine Flight School of Texas LLC
Wilmington, Delaware
Standard 2013-02-20 ValidFAA registration status code V: Valid registration. All codes
N2545C Piper Aircraft Inc
PA-44-180
Fixed-wing, multi-engine Dot Aviation LLC
Wilmington, Delaware
Standard 2012-11-01 ValidFAA registration status code V: Valid registration. All codes
N886AT Piper
PA-44-180
Fixed-wing, multi-engine Dot Aviation LLC
Wilmington, Delaware
Standard 2012-10-09 ValidFAA registration status code V: Valid registration. All codes
N885AT Piper
PA-44-180
Fixed-wing, multi-engine Dot Aviation LLC
Wilmington, Delaware
Standard 2012-09-17 ValidFAA registration status code V: Valid registration. All codes
N882AT Piper Aircraft Inc
PA-44-180
Fixed-wing, multi-engine Dot Aviation LLC
Wilmington, Delaware
Standard 2012-07-27 ValidFAA registration status code V: Valid registration. All codes
N836AT Piper
PA-44-180
Fixed-wing, multi-engine Dot Aviation LLC
Wilmington, Delaware
Standard 2012-07-12 ValidFAA registration status code V: Valid registration. All codes
N835AT Piper
PA-44-180
Fixed-wing, multi-engine Dot Aviation LLC
Wilmington, Delaware
Standard 2012-07-03 ValidFAA registration status code V: Valid registration. All codes
N834AT Piper Aircraft Inc
PA-44-180
Fixed-wing, multi-engine Dot Aviation LLC
Wilmington, Delaware
Standard 2012-06-13 ValidFAA registration status code V: Valid registration. All codes
N833AT Piper
PA-44-180
Fixed-wing, multi-engine Dot Aviation LLC
Wilmington, Delaware
Standard 2012-05-22 ValidFAA registration status code V: Valid registration. All codes
N832AT Piper
PA-44-180
Fixed-wing, multi-engine Dot Aviation LLC
Wilmington, Delaware
Standard 2012-05-14 ValidFAA registration status code V: Valid registration. All codes
N682AT Piper Aircraft Inc
PA-44-180
Fixed-wing, multi-engine Texas Flight Training Aircraft 8 LLC
Wilmington, Delaware
Standard 2011-01-27 ValidFAA registration status code V: Valid registration. All codes
N686AT Piper Aircraft Inc
PA-44-180
Fixed-wing, multi-engine Texas Flight Training Aircraft 8 LLC
Wilmington, Delaware
Standard 2011-01-14 ValidFAA registration status code V: Valid registration. All codes
N685AT Piper Aircraft Inc
PA-44-180
Fixed-wing, multi-engine Texas Flight Training Aircraft 8 LLC
Wilmington, Delaware
Standard 2011-01-07 ValidFAA registration status code V: Valid registration. All codes
N684AT Piper Aircraft Inc
PA-44-180
Fixed-wing, multi-engine Texas Flight Training Aircraft 8 LLC
Wilmington, Delaware
Standard 2011-01-06 ValidFAA registration status code V: Valid registration. All codes
N24041 Piper Aircraft Inc
PA-44-180
Fixed-wing, multi-engine Texas Flight Training Aircraft 8 LLC
Wilmington, Delaware
Standard 2010-12-17 ValidFAA registration status code V: Valid registration. All codes
N6084C Piper Aircraft Inc
PA-44-180
Fixed-wing, multi-engine Big Bend Community College
Moses Lake, Washington
Standard 2010-07-29 ValidFAA registration status code V: Valid registration. All codes
N8344A Piper Aircraft Inc
PA-44-180
Fixed-wing, multi-engine Atp Aircraft 8 LLC
Wilmington, Delaware
Standard 2008-11-25 ValidFAA registration status code V: Valid registration. All codes
N6818A Piper
PA-44-180
Fixed-wing, multi-engine Atp Aircraft 8 LLC
Wilmington, Delaware
Standard 2008-09-25 ValidFAA registration status code V: Valid registration. All codes
N6816A Piper Aircraft Inc
PA-44-180
Fixed-wing, multi-engine Atp Aircraft 8 LLC
Wilmington, Delaware
Standard 2008-09-16 ValidFAA registration status code V: Valid registration. All codes
N5823A Piper Aircraft Inc
PA-44-180
Fixed-wing, multi-engine Atp Aircraft 8 LLC
Wilmington, Delaware
Standard 2008-08-19 ValidFAA registration status code V: Valid registration. All codes
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Source: FAA Civil Aviation Registry, Releasable Aircraft Database (the engine reference table and each aircraft's engine code), October 5, 2026. Horsepower and thrust are the FAA's figures for the series, not for a particular aircraft.