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

Lycoming IO-540-AB1A5

768 aircraft on the U.S. register carry a Lycoming IO-540-AB1A5 engine, rated at about 230 horsepower. The Cessna 182 Skylane is the model most often fitted with it (767 aircraft). The aircraft carrying it were built between 1998 and 2026.

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 IO-540-AB1A5. FAA spelling: IO-540-AB1A5.

Fitted to model families

Cessna 182 Skylane767Cessna T182 Turbo Skylane1

Cessna 182 Skylane · Cessna T182 Turbo Skylane

Where they are owner's state

Alabama205Texas71Florida56Virginia42Delaware41California27Kansas26North Carolina23Georgia23Michigan15

Kind of aircraft

Piston singles767 (100%)Turboprops1 (0.1%)

When the aircraft were built by decade

072144216288241990288200023820101952020

What the FAA has certified, ordered and been told about the Lycoming IO-540-AB1A5 the component layer

The design is held under 1 type certificate (1E4, held by Lycoming Engines). The FAA has issued 25 airworthiness directives (orders that owners must comply with) that name this engine series. Operators and repair shops have filed 138 failure reports with the FAA since 1995, 36 of them in the last ten years.

FAA orders 25 airworthiness directives · newest first

2026-09-142026-17-10 · Reciprocating Engine Cylinder Section · engine
2026-04-082026-04-11 · Engine (Reciprocating) · engine
2024-12-052024-21-02 · Engine (Reciprocating) · engine
2017-08-152017-16-11 · Reciprocating Engine Power Section · engine
2015-11-032015-19-07 · Fuel injector fuel lines · engine
2012-10-242012-19-01 · Crankshafts · engine

All orders naming the Lycoming IO-540-AB1A5

Failure reports 138 since · what operators and shops told the FAA

04811150005101520226

Parts most often reported as the reports name them

Exhaust Valve20Pushrod20Magneto11Doubler7Alternator4Brushes3Gasket3Points3Skin3Valve Guide3

Latest reports

2026-02-10Doubler: cracked
2026-02-02Doubler: cracked
2025-12-02Doubler: cracked
2025-08-06Skin: cracked
2023-07-31Alternator: seized

Certificates and bulletins

1E4Type certificate held by Lycoming Engines · 81 models listed · revised February 28, 2018

Safety bulletins 6 · advice, not orders

2019-05-02NE-19-08 · Reciprocating Engine Cylinder Section - Lycoming Engines Parallel Valve Cylinders
2016-05-13NE-08-32R1 · Propeller Governor Idler Gear Shaft Set Screw
2014-03-24NE-14-13 · Reciprocating Engine - Cylinder Mounting Studs
2012-11-21NE-13-06 · Pushrod Shroud Spring Retainers, Engine Components Part No. AEL14995, for Lycoming Engines 320,...
2008-09-10NE-06-32R1 · Reciprocating Engine - Crankshaft

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-io-540-ab1a5.json · about the eFlight graph.

Aircraft newest certificates first · 768

Tail no.Maker and modelGroupOwner and baseCertificateRegisteredStatus
N986MT Cessna
182T
Fixed-wing, single engine Otv Leasing
Bristow, Virginia
Standard 2010-06-08 ValidFAA registration status code V: Valid registration. All codes
N490CP Cessna
182T
Fixed-wing, single engine Civil Air Patrol
Maxwell Afb, Alabama
Standard 2010-04-26 ValidFAA registration status code V: Valid registration. All codes
N883CP Cessna
182T
Fixed-wing, single engine Civil Air Patrol
Maxwell Afb, Alabama
Standard 2010-03-29 ValidFAA registration status code V: Valid registration. All codes
N429JP Cessna
182T
Fixed-wing, single engine Hnb Aviation LLC
Forestburg, Texas
Standard 2010-01-20 ValidFAA registration status code V: Valid registration. All codes
N370JH Cessna
182T
Fixed-wing, single engine National Aircraft Leasing CORP
Greenville, Delaware
Standard 2010-01-12 ValidFAA registration status code V: Valid registration. All codes
N385RB Cessna
182T
Fixed-wing, single engine National Aircraft Leasing CORP
Greenville, Delaware
Standard 2010-01-12 ValidFAA registration status code V: Valid registration. All codes
N608SH Cessna
182T
Fixed-wing, single engine National Aircraft Leasing CORP
Greenville, Delaware
Standard 2010-01-12 ValidFAA registration status code V: Valid registration. All codes
N922MK Cessna
182T
Fixed-wing, single engine National Aircraft Leasing CORP
Greenville, Delaware
Standard 2010-01-12 ValidFAA registration status code V: Valid registration. All codes
N962PB Cessna
182T
Fixed-wing, single engine National Aircraft Leasing CORP
Greenville, Delaware
Standard 2010-01-06 ValidFAA registration status code V: Valid registration. All codes
N149CP Cessna
182T
Fixed-wing, single engine Civil Air Patrol
Maxwell Afb, Alabama
Standard 2009-12-28 ValidFAA registration status code V: Valid registration. All codes
N397CP Cessna
182T
Fixed-wing, single engine Civil Air Patrol
Maxwell Afb, Alabama
Standard 2009-12-28 ValidFAA registration status code V: Valid registration. All codes
N313CP Cessna
182T
Fixed-wing, single engine Civil Air Patrol
Maxwell Afb, Alabama
Standard 2009-12-24 ValidFAA registration status code V: Valid registration. All codes
N434CP Cessna
182T
Fixed-wing, single engine Civil Air Patrol
Maxwell Afb, Alabama
Standard 2009-12-24 ValidFAA registration status code V: Valid registration. All codes
N451CP Cessna
182T
Fixed-wing, single engine Civil Air Patrol
Maxwell Afb, Alabama
Standard 2009-12-24 ValidFAA registration status code V: Valid registration. All codes
N455CP Cessna
182T
Fixed-wing, single engine Civil Air Patrol
Maxwell Afb, Alabama
Standard 2009-12-24 ValidFAA registration status code V: Valid registration. All codes
N854CP Cessna
182T
Fixed-wing, single engine Civil Air Patrol
Maxwell Afb, Alabama
Standard 2009-12-24 ValidFAA registration status code V: Valid registration. All codes
N622FH Cessna
182T
Fixed-wing, single engine National Aircraft Leasing CORP
Greenville, Delaware
Standard 2009-12-21 ValidFAA registration status code V: Valid registration. All codes
N632MR Cessna
182T
Fixed-wing, single engine National Aircraft Leasing CORP
Greenville, Delaware
Standard 2009-12-21 ValidFAA registration status code V: Valid registration. All codes
N495WW Cessna
182T
Fixed-wing, single engine National Aircraft Leasing CORP
Greenville, Delaware
Standard 2009-12-17 ValidFAA registration status code V: Valid registration. All codes
N510KS Cessna
182T
Fixed-wing, single engine National Aircraft Leasing CORP
Greenville, Delaware
Standard 2009-12-17 ValidFAA registration status code V: Valid registration. All codes
N536GR Cessna
182T
Fixed-wing, single engine National Aircraft Leasing CORP
Greenville, Delaware
Standard 2009-12-17 ValidFAA registration status code V: Valid registration. All codes
N712MS Cessna
182T
Fixed-wing, single engine National Aircraft Leasing
Greenville, Delaware
Standard 2009-12-17 ValidFAA registration status code V: Valid registration. All codes
N859JA Cessna
182
Fixed-wing, single engine National Aircraft Leasing
Greenville, Delaware
Standard 2009-12-17 ValidFAA registration status code V: Valid registration. All codes
N962JB Cessna
182T
Fixed-wing, single engine National Aircraft Leasing CORP
Greenville, Delaware
Standard 2009-12-17 ValidFAA registration status code V: Valid registration. All codes
N169CP Cessna
182T
Fixed-wing, single engine Civil Air Patrol
Maxwell Afb, Alabama
Standard 2009-10-14 ValidFAA registration status code V: Valid registration. All codes
N184CP Cessna
182T
Fixed-wing, single engine Civil Air Patrol
Maxwell Afb, Alabama
Standard 2009-10-14 ValidFAA registration status code V: Valid registration. All codes
N567CP Cessna
182T
Fixed-wing, single engine Civil Air Patrol
Maxwell Afb, Alabama
Standard 2009-10-14 ValidFAA registration status code V: Valid registration. All codes
N585CP Cessna
182T
Fixed-wing, single engine Civil Air Patrol
Maxwell Afb, Alabama
Standard 2009-10-14 ValidFAA registration status code V: Valid registration. All codes
N590CP Cessna
182T
Fixed-wing, single engine Civil Air Patrol
Maxwell Afb, Alabama
Standard 2009-10-14 ValidFAA registration status code V: Valid registration. All codes
N591CP Cessna
182T
Fixed-wing, single engine Civil Air Patrol
Maxwell Afb, Alabama
Standard 2009-10-14 ValidFAA registration status code V: Valid registration. All codes
N593CP Cessna
182T
Fixed-wing, single engine Civil Air Patrol
Montgomery, Alabama
Standard 2009-10-14 ValidFAA registration status code V: Valid registration. All codes
N594CP Cessna
182T
Fixed-wing, single engine Civil Air Patrol
Maxwell Afb, Alabama
Standard 2009-10-14 ValidFAA registration status code V: Valid registration. All codes
N879CP Cessna
182T
Fixed-wing, single engine Civil Air Patrol
Maxwell Afb, Alabama
Standard 2009-10-14 ValidFAA registration status code V: Valid registration. All codes
N950CP Cessna
182T
Fixed-wing, single engine Civil Air Patrol
Maxwell Afb, Alabama
Standard 2009-10-14 ValidFAA registration status code V: Valid registration. All codes
N1483L Cessna
182T
Fixed-wing, single engine 83L Ventures LLC
San Carlos, California
Standard 2009-02-27 ValidFAA registration status code V: Valid registration. All codes
N261CA Cessna
182T
Fixed-wing, single engine Civil Air Patrol
Maxwell Afb, Alabama
Standard 2009-01-07 ValidFAA registration status code V: Valid registration. All codes
N344CA Cessna
182T
Fixed-wing, single engine Civil Air Patrol
Maxwell Afb, Alabama
Standard 2009-01-07 ValidFAA registration status code V: Valid registration. All codes
N482CA Cessna
182T
Fixed-wing, single engine Civil Air Patrol
Maxwell Afb, Alabama
Standard 2009-01-07 ValidFAA registration status code V: Valid registration. All codes
N574CA Cessna
182T
Fixed-wing, single engine Civil Air Patrol
Maxwell Afb, Alabama
Standard 2009-01-07 ValidFAA registration status code V: Valid registration. All codes
N576CA Cessna
182T
Fixed-wing, single engine Civil Air Patrol
Montgomery, Alabama
Standard 2009-01-07 ValidFAA registration status code V: Valid registration. All codes
N794CA Cessna
182T
Fixed-wing, single engine Civil Air Patrol
Maxwell Afb, Alabama
Standard 2009-01-07 ValidFAA registration status code V: Valid registration. All codes
N422MT Cessna
182T
Fixed-wing, single engine Missouri Dept of Transportation
Jefferson City, Missouri
Standard 2008-10-17 ValidFAA registration status code V: Valid registration. All codes
N365CA Cessna
182T
Fixed-wing, single engine Civil Air Patrol
Maxwell Afb, Alabama
Standard 2008-09-24 ValidFAA registration status code V: Valid registration. All codes
N397CA Cessna
182T
Fixed-wing, single engine Civil Air Patrol
Maxwell Afb, Alabama
Standard 2008-09-24 ValidFAA registration status code V: Valid registration. All codes
N759CA Cessna
182T
Fixed-wing, single engine Civil Air Patrol
Maxwell Afb, Alabama
Standard 2008-09-24 ValidFAA registration status code V: Valid registration. All codes
N767CA Cessna
182T
Fixed-wing, single engine Civil Air Patrol
Maxwell Afb, Alabama
Standard 2008-09-24 ValidFAA registration status code V: Valid registration. All codes
N884CP Cessna
182T
Fixed-wing, single engine Civil Air Patrol
Maxwell Afb, Alabama
Standard 2008-09-24 ValidFAA registration status code V: Valid registration. All codes
N948CP Cessna
182T
Fixed-wing, single engine Civil Air Patrol
Maxwell Afb, Alabama
Standard 2008-09-24 ValidFAA registration status code V: Valid registration. All codes
N989CP Cessna
182T
Fixed-wing, single engine Civil Air Patrol
Maxwell Afb, Alabama
Standard 2008-09-24 ValidFAA registration status code V: Valid registration. All codes
N366NH Cessna
182T
Fixed-wing, single engine State of New Hampshire Dept of Safety
Concord, New Hampshire
Standard 2008-08-15 ValidFAA registration status code V: Valid registration. All codes
N682SP Cessna
182T
Fixed-wing, single engine Co-owned owner
New Jersey
Standard 2008-08-07 ValidFAA registration status code V: Valid registration. All codes
N1725L Cessna
182T
Fixed-wing, single engine Individual owner
Virginia
Standard 2008-07-30 ValidFAA registration status code V: Valid registration. All codes
N1162U Cessna
182T
Fixed-wing, single engine Individual owner
Massachusetts
Standard 2008-06-30 ValidFAA registration status code V: Valid registration. All codes
N158FC Cessna
182T
Fixed-wing, single engine Dept of Agriculture & Consumer Services
Tallahassee, Florida
Standard 2008-06-25 ValidFAA registration status code V: Valid registration. All codes
N516DM Cessna
182S
Fixed-wing, single engine Individual owner
Connecticut
Standard 2008-04-14 ValidFAA registration status code V: Valid registration. All codes
N965CP Cessna
182T
Fixed-wing, single engine Civil Air Patrol
Maxwell Afb, Alabama
Standard 2008-01-22 ValidFAA registration status code V: Valid registration. All codes
N293CP Cessna
182T
Fixed-wing, single engine Civil Air Patrol
Maxwell Afb, Alabama
Standard 2008-01-16 ValidFAA registration status code V: Valid registration. All codes
N294CP Cessna
182T
Fixed-wing, single engine Civil Air Patrol
Maxwell Afb, Alabama
Standard 2008-01-16 ValidFAA registration status code V: Valid registration. All codes
N296CP Cessna
182T
Fixed-wing, single engine Civil Air Patrol
Maxwell Afb, Alabama
Standard 2008-01-16 ValidFAA registration status code V: Valid registration. All codes
N370CP Cessna
182T
Fixed-wing, single engine Civil Air Patrol
Maxwell Afb, Alabama
Standard 2008-01-16 ValidFAA registration status code V: Valid registration. All codes
N371CP Cessna
182T
Fixed-wing, single engine Civil Air Patrol
Maxwell Afb, Alabama
Standard 2008-01-16 ValidFAA registration status code V: Valid registration. All codes
N372CP Cessna
182T
Fixed-wing, single engine Civil Air Patrol
Maxwell Afb, Alabama
Standard 2008-01-16 ValidFAA registration status code V: Valid registration. All codes
N398CP Cessna
182T
Fixed-wing, single engine Civil Air Patrol
Maxwell Afb, Alabama
Standard 2008-01-16 ValidFAA registration status code V: Valid registration. All codes
N399CP Cessna
182T
Fixed-wing, single engine Civil Air Patrol
Maxwell Afb, Alabama
Standard 2008-01-16 ValidFAA registration status code V: Valid registration. All codes
N976CP Cessna
182T
Fixed-wing, single engine Civil Air Patrol
Maxwell Afb, Alabama
Standard 2008-01-16 ValidFAA registration status code V: Valid registration. All codes
N997CP Cessna
182T
Fixed-wing, single engine Civil Air Patrol
Maxwell Afb, Alabama
Standard 2008-01-16 ValidFAA registration status code V: Valid registration. All codes
N189CP Cessna
182T
Fixed-wing, single engine Civil Air Patrol
Maxwell Afb, Alabama
Standard 2008-01-14 ValidFAA registration status code V: Valid registration. All codes
N288CP Cessna
182T
Fixed-wing, single engine Civil Air Patrol
Maxwell Afb, Alabama
Standard 2008-01-14 ValidFAA registration status code V: Valid registration. All codes
N292CP Cessna
182T
Fixed-wing, single engine Civil Air Patrol
Maxwell Afb, Alabama
Standard 2008-01-14 ValidFAA registration status code V: Valid registration. All codes
N960CP Cessna
182T
Fixed-wing, single engine Civil Air Patrol
Maxwell Afb, Alabama
Standard 2008-01-14 ValidFAA registration status code V: Valid registration. All codes
N90HP Cessna
182T
Fixed-wing, single engine Oklahoma Department of Public Safety
Norman, Oklahoma
Standard 2008-01-09 ValidFAA registration status code V: Valid registration. All codes
N151FC Cessna
182T
Fixed-wing, single engine Department of Agriculture and Consumer Services
Tallahassee, Florida
Standard 2007-12-19 ValidFAA registration status code V: Valid registration. All codes
N2123Y Cessna
182T
Fixed-wing, single engine Palin Investments 3 LLC
Vancouver, Washington
Standard 2007-12-19 ValidFAA registration status code V: Valid registration. All codes
N374CP Cessna
182T
Fixed-wing, single engine Civil Air Patrol
Maxwell Afb, Alabama
Standard 2007-12-12 ValidFAA registration status code V: Valid registration. All codes
N941CP Cessna
182T
Fixed-wing, single engine Civil Air Patrol
Maxwell Afb, Alabama
Standard 2007-12-12 ValidFAA registration status code V: Valid registration. All codes
N959CP Cessna
182T
Fixed-wing, single engine Civil Air Patrol
Maxwell Afb, Alabama
Standard 2007-12-12 ValidFAA registration status code V: Valid registration. All codes
N962CP Cessna
182T
Fixed-wing, single engine Civil Air Patrol
Maxwell Afb, Alabama
Standard 2007-12-12 ValidFAA registration status code V: Valid registration. All codes
N966CP Cessna
182T
Fixed-wing, single engine Civil Air Patrol
Maxwell Afb, Alabama
Standard 2007-12-12 ValidFAA registration status code V: Valid registration. All codes
N967CP Cessna
182T
Fixed-wing, single engine Civil Air Patrol
Maxwell Afb, Alabama
Standard 2007-12-12 ValidFAA registration status code V: Valid registration. All codes
N968CP Cessna
182T
Fixed-wing, single engine Civil Air Patrol
Maxwell Afb, Alabama
Standard 2007-12-12 ValidFAA registration status code V: Valid registration. All codes
N970CP Cessna
182T
Fixed-wing, single engine Civil Air Patrol
Maxwell Afb, Alabama
Standard 2007-12-12 ValidFAA registration status code V: Valid registration. All codes
N971CP Cessna
182T
Fixed-wing, single engine Civil Air Patrol
Maxwell Afb, Alabama
Standard 2007-12-12 ValidFAA registration status code V: Valid registration. All codes
N373CP Cessna
182T
Fixed-wing, single engine Civil Air Patrol
Maxwell Afb, Alabama
Standard 2007-12-11 ValidFAA registration status code V: Valid registration. All codes
N947CP Cessna
182T
Fixed-wing, single engine Civil Air Patrol
Maxwell Afb, Alabama
Standard 2007-12-11 ValidFAA registration status code V: Valid registration. All codes
N963CP Cessna
182T
Fixed-wing, single engine Civil Air Patrol
Maxwell Afb, Alabama
Standard 2007-12-11 ValidFAA registration status code V: Valid registration. All codes
N975CP Cessna
182T
Fixed-wing, single engine Civil Air Patrol
Maxwell Afb, Alabama
Standard 2007-12-11 ValidFAA registration status code V: Valid registration. All codes
N22669 Cessna
182T
Fixed-wing, single engine R S Bowen Enterprises LLC
Flowery Branch, Georgia
Standard 2007-11-09 ValidFAA registration status code V: Valid registration. All codes
N171SP Cessna
182T
Fixed-wing, single engine State of Iowa - Iowa State Patrol
Des Moines, Iowa
Standard 2007-11-06 ValidFAA registration status code V: Valid registration. All codes
N2231E Cessna
182T
Fixed-wing, single engine State of Iowa
Des Moines, Iowa
Standard 2007-09-15 ValidFAA registration status code V: Valid registration. All codes
N60279 Cessna
182T
Fixed-wing, single engine Tensco INC
Twin Falls, Idaho
Standard 2007-07-02 ValidFAA registration status code V: Valid registration. All codes
N935FA Cessna
182T
Fixed-wing, single engine Caylin LLC
Wilmington, Delaware
Standard 2007-06-20 ValidFAA registration status code V: Valid registration. All codes
N2152K Cessna
182T
Fixed-wing, single engine Skylane Flights LLC
West Palm Beach, Florida
Standard 2007-06-04 ValidFAA registration status code V: Valid registration. All codes
N7791C Cessna
182T
Fixed-wing, single engine Individual owner
Missouri
Standard 2007-05-08 ValidFAA registration status code V: Valid registration. All codes
N611HP Cessna
182T
Fixed-wing, single engine Florida Highway Patrol
Tampa, Florida
Standard 2007-04-26 ValidFAA registration status code V: Valid registration. All codes
N428LB Cessna
182T
Fixed-wing, single engine Mam Aviation LLC
New York, New York
Standard 2007-03-28 ValidFAA registration status code V: Valid registration. All codes
N157FC Cessna
182T
Fixed-wing, single engine Department of Agriculture & Consummer Services
Tallahassee, Florida
Standard 2007-03-20 ValidFAA registration status code V: Valid registration. All codes
N165CP Cessna
182T
Fixed-wing, single engine Civil Air Patrol
Maxwell Afb, Alabama
Standard 2007-02-06 ValidFAA registration status code V: Valid registration. All codes
N60430 Cessna
182T
Fixed-wing, single engine County of Henrico Virginia
Henrico, Virginia
Standard 2007-02-06 ValidFAA registration status code V: Valid registration. All codes
N873CP Cessna
182T
Fixed-wing, single engine Civil Air Patrol
Maxwell Afb, Alabama
Standard 2007-02-06 ValidFAA registration status code V: Valid registration. All codes
N875CP Cessna
182T
Fixed-wing, single engine Civil Air Patrol
Maxwell Afb, Alabama
Standard 2007-02-06 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.