Lycoming IO-540-AC1A5
50 aircraft on the U.S. register carry a Lycoming IO-540-AC1A5 engine, rated at about 300 horsepower. The Cessna 206 Stationair is the model most often fitted with it (46 aircraft). The aircraft carrying it were built between 1999 and 2013.
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-AC1A5. FAA spelling: IO-540-AC1A5.
Fitted to model families
Cessna 206 Stationair46Cessna T206 Turbo Stationair1David Guntly SKYBOLT1Robinson R441Wik Jay C RV-101
Cessna 206 Stationair · Cessna T206 Turbo Stationair · David Guntly SKYBOLT · Robinson R44 · Wik Jay C RV-10
Where they are owner's state
Texas11Utah6Virginia3Puerto Rico3Florida3Ohio2North Carolina2Maryland2Louisiana2Kansas2
Kind of aircraft
Piston singles49 (98%)Helicopters1 (2%)
When the aircraft were built by decade
What the FAA has certified, ordered and been told about the Lycoming IO-540-AC1A5 the component layer
The design is held under 1 type certificate (1E4, held by Lycoming Engines). The FAA has issued 24 airworthiness directives (orders that owners must comply with) that name this engine series. Operators and repair shops have filed 45 failure reports with the FAA since 1995, 16 of them in the last ten years.
FAA orders 24 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
Failure reports 45 since · what operators and shops told the FAA
Parts most often reported as the reports name them
Pump5Connector3Line3Alternator2Engine2Gasket2Intake Valve2Magneto2Pushrod2Servo2
Latest reports
2024-05-20Magneto: failed
2024-01-29Blade: loose
2024-01-29Magneto: failed
2018-08-03Intake Valve: broken
2017-07-18Pump: sheared
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
- Cessna 206 Stationair 46 with this engine series
- Cessna T206 Turbo Stationair 1 with this engine series
- Robinson R44 1 with this engine series
Where they are
- Texas 11 of these aircraft
- Utah 6 of these aircraft
- Virginia 3 of these aircraft
- Puerto Rico 3 of these aircraft
- Florida 3 of these aircraft
Biggest operators
- Silver Creek Aviation Services 9 of these aircraft
- Tvpx Aircraft Solutions INC Trustee 6 of these aircraft
- U S Department Of The Interior 2 of these aircraft
- Kansas Highway Patrol 2 of these aircraft
Airworthiness
- FAA orders naming the Lycoming IO-540-AC1A5 24 airworthiness directives
- Failure reports on the Lycoming IO-540-AC1A5 45 reports since 1995
Analytics
These connections as data: /graph/engine/lycoming-io-540-ac1a5.json · about the eFlight graph.
Aircraft newest certificates first · 50
| Tail no. | Maker and model | Group | Owner and base | Certificate | Registered | Status |
|---|---|---|---|---|---|---|
| N137P | Cessna 206H |
Fixed-wing, single engine | Individual owner South Carolina |
Standard | 2026-09-30 | ValidFAA registration status code V: Valid registration. All codes |
| N158P | Cessna 206H |
Fixed-wing, single engine | Andry Holdings LLC Missoula, Montana |
Standard | 2026-09-25 | ValidFAA registration status code V: Valid registration. All codes |
| N564LM | Cessna 206H |
Fixed-wing, single engine | Sky Horse LLC Santa Cruz, California |
Standard | 2026-09-18 | ValidFAA registration status code V: Valid registration. All codes |
| N7254H | Cessna 206H |
Fixed-wing, single engine | Vevani Aircraft LLC Miami Gardens, Florida |
Standard | 2026-03-20 | ValidFAA registration status code V: Valid registration. All codes |
| N9536F | Cessna 206H |
Fixed-wing, single engine | Tvpx Aircraft Solutions INC Trustee North Salt Lake, Utah |
Standard | 2025-12-05 | ValidFAA registration status code V: Valid registration. All codes |
| N9433R | Cessna 206H |
Fixed-wing, single engine | Tvpx Aircraft Solutions INC Trustee North Salt Lake, Utah |
Standard | 2025-12-03 | ValidFAA registration status code V: Valid registration. All codes |
| N94405 | Cessna 206H |
Fixed-wing, single engine | Tvpx Aircraft Solutions INC Trustee North Salt Lake, Utah |
Standard | 2025-12-03 | ValidFAA registration status code V: Valid registration. All codes |
| N590MM | Cessna 206H |
Fixed-wing, single engine | Tvpx Aircraft Solutions INC Trustee North Salt Lake, Utah |
Standard | 2025-11-21 | ValidFAA registration status code V: Valid registration. All codes |
| N841LM | Cessna 206H |
Fixed-wing, single engine | Tvpx Aircraft Solutions INC Trustee North Salt Lake, Utah |
Standard | 2025-11-21 | ValidFAA registration status code V: Valid registration. All codes |
| N2175Q | Cessna 206H |
Fixed-wing, single engine | Tvpx Aircraft Solutions INC Trustee North Salt Lake, Utah |
Standard | 2025-11-20 | ValidFAA registration status code V: Valid registration. All codes |
| N293RC | Cessna 206H |
Fixed-wing, single engine | Charlie Papa Aviation LLC Mayaguez, Puerto Rico |
Standard | 2025-10-30 | ValidFAA registration status code V: Valid registration. All codes |
| N865W | Cessna 206H |
Fixed-wing, single engine | Michigan Dept of Natural Resources Roscommon, Michigan |
Standard | 2025-02-22 | ValidFAA registration status code V: Valid registration. All codes |
| N540DG | David Guntly SKYBOLT |
Fixed-wing, single engine | Individual owner Virginia |
Experimental | 2024-04-27 | ValidFAA registration status code V: Valid registration. All codes |
| N833CG | Cessna 206H |
Fixed-wing, single engine | Paragon Air Group Fort Worth, Texas |
Standard | 2023-09-26 | ValidFAA registration status code V: Valid registration. All codes |
| N90322 | Cessna 206H |
Fixed-wing, single engine | State of Alaska Department of Public Safety Anchorage, Alaska |
Standard | 2023-09-22 | ValidFAA registration status code V: Valid registration. All codes |
| N2163S | Cessna 206H |
Fixed-wing, single engine | Olde Towne Transport LLC Beaufort, North Carolina |
Standard | 2023-07-27 | ValidFAA registration status code V: Valid registration. All codes |
| N334WD | Cessna 206H |
Fixed-wing, single engine | Southwest Aviation Enterprises Haslet, Texas |
Standard | 2023-07-07 | ValidFAA registration status code V: Valid registration. All codes |
| N86WE | Cessna 206H |
Fixed-wing, single engine | Blue Air 1 LLC Homestead, Florida |
Standard | 2022-05-03 | ValidFAA registration status code V: Valid registration. All codes |
| N904CR | Cessna T206H |
Fixed-wing, single engine | Los Cazadores Aviation LLC Cut Off, Louisiana |
Standard | 2022-04-30 | ValidFAA registration status code V: Valid registration. All codes |
| N132PS | Cessna 206H |
Fixed-wing, single engine | U S Department of the Interior Boise, Idaho |
Standard | 2022-04-06 | ValidFAA registration status code V: Valid registration. All codes |
| N267MC | Cessna 206H |
Fixed-wing, single engine | Individual owner Massachusetts |
Standard | 2021-12-29 | ValidFAA registration status code V: Valid registration. All codes |
| N294PJ | Robinson Helicopter R44 II |
Helicopter | Individual owner Ohio |
Standard | 2021-02-09 | ValidFAA registration status code V: Valid registration. All codes |
| N193P | Cessna 206H |
Fixed-wing, single engine | Nc Wildlife Resources Commission Enforcement Div Raleigh, North Carolina |
Standard | 2020-07-16 | ValidFAA registration status code V: Valid registration. All codes |
| N206ZB | Cessna 206H |
Fixed-wing, single engine | 16D LLC Vashon, Washington |
Standard | 2020-01-14 | ValidFAA registration status code V: Valid registration. All codes |
| N571TC | Cessna 206H |
Fixed-wing, single engine | Individual owner Louisiana |
Standard | 2019-02-13 | ValidFAA registration status code V: Valid registration. All codes |
| N2461D | Cessna 206H |
Fixed-wing, single engine | Winged Vision INC Gaithersburg, Maryland |
Standard | 2018-11-29 | ValidFAA registration status code V: Valid registration. All codes |
| N102AK | Cessna 206H |
Fixed-wing, single engine | Standard | 2018-07-30 | ValidFAA registration status code V: Valid registration. All codes | |
| N223HC | Cessna 206H |
Fixed-wing, single engine | G206 LLC San Juan, Puerto Rico |
Standard | 2017-12-06 | ValidFAA registration status code V: Valid registration. All codes |
| N767GE | Cessna 206H |
Fixed-wing, single engine | Greystoke Leasing INC Flagstaff, Arizona |
Standard | 2017-06-09 | ValidFAA registration status code V: Valid registration. All codes |
| N206FN | Cessna 206H |
Fixed-wing, single engine | Flying Neutrons LLC Lebanon, Ohio |
Standard | 2016-08-22 | ValidFAA registration status code V: Valid registration. All codes |
| N206MX | Cessna 206H |
Fixed-wing, single engine | Frogfeet LLC Barcelona, |
Standard | 2016-03-05 | ValidFAA registration status code V: Valid registration. All codes |
| N2462G | Cessna 206H |
Fixed-wing, single engine | Winged Vision INC Gaithersburg, Maryland |
Standard | 2015-06-03 | ValidFAA registration status code V: Valid registration. All codes |
| N12730 | Cessna 206H |
Fixed-wing, single engine | Silver Creek Aviation Services Fort Worth, Texas |
Standard | 2014-07-25 | ValidFAA registration status code V: Valid registration. All codes |
| N6188Q | Cessna 206H |
Fixed-wing, single engine | Silver Creek Aviation Services Fort Worth, Texas |
Standard | 2014-07-25 | ValidFAA registration status code V: Valid registration. All codes |
| N786TF | Cessna 206H |
Fixed-wing, single engine | American Corporate Executive Services Plantation, Florida |
Standard | 2014-04-04 | ValidFAA registration status code V: Valid registration. All codes |
| N473YC | Cessna 206H |
Fixed-wing, single engine | U S Department of the Interior Boise, Idaho |
Standard | 2012-10-31 | ValidFAA registration status code V: Valid registration. All codes |
| N51HF | Cessna 206H |
Fixed-wing, single engine | San Mateo County Sheriff'S Office Redwood City, California |
Standard | 2012-10-12 | ValidFAA registration status code V: Valid registration. All codes |
| N900HP | Cessna 206H |
Fixed-wing, single engine | Kansas Highway Patrol Topeka, Kansas |
Standard | 2012-08-28 | ValidFAA registration status code V: Valid registration. All codes |
| N940HP | Cessna 206H |
Fixed-wing, single engine | Kansas Highway Patrol Topeka, Kansas |
Standard | 2012-08-14 | ValidFAA registration status code V: Valid registration. All codes |
| N6188B | Cessna 206H |
Fixed-wing, single engine | Silver Creek Aviation Services Fort Worth, Texas |
Standard | 2012-05-29 | ValidFAA registration status code V: Valid registration. All codes |
| N852LR | Cessna 206H |
Fixed-wing, single engine | Silver Creek Aviation Services Fort Worth, Texas |
Standard | 2012-05-29 | ValidFAA registration status code V: Valid registration. All codes |
| N6187Y | Cessna 206H |
Fixed-wing, single engine | Silver Creek Aviation Services Fort Worth, Texas |
Standard | 2012-03-08 | ValidFAA registration status code V: Valid registration. All codes |
| N1338B | Cessna 206H |
Fixed-wing, single engine | Silver Creek Aviation Services Fort Worth, Texas |
Standard | 2012-01-25 | ValidFAA registration status code V: Valid registration. All codes |
| N332SC | Cessna 206H |
Fixed-wing, single engine | Silver Creek Aviation Services Fort Worth, Texas |
Standard | 2012-01-25 | ValidFAA registration status code V: Valid registration. All codes |
| N8330B | Cessna 206H |
Fixed-wing, single engine | Silver Creek Aviation Services Fort Worth, Texas |
Standard | 2012-01-25 | ValidFAA registration status code V: Valid registration. All codes |
| N484JB | Cessna 206H |
Fixed-wing, single engine | Silver Creek Aviation Services Fort Worth, Texas |
Standard | 2011-10-18 | ValidFAA registration status code V: Valid registration. All codes |
| N281RJ | Wik Jay C RV-10 |
Fixed-wing, single engine | Individual owner Minnesota |
Experimental | 2011-09-19 | ValidFAA registration status code V: Valid registration. All codes |
| N610AG | Cessna 206H |
Fixed-wing, single engine | Obr Leasing Bristow, Virginia |
Standard | 2011-03-29 | ValidFAA registration status code V: Valid registration. All codes |
| N612BK | Cessna 206H |
Fixed-wing, single engine | Kqm Aviation Manassas, Virginia |
Standard | 2011-03-29 | ValidFAA registration status code V: Valid registration. All codes |
| N288SP | Cessna 206H |
Fixed-wing, single engine | Glass Cockpit Aviation INC San Juan, Puerto Rico |
Standard | 2006-12-20 | ValidFAA registration status code V: Valid registration. All codes |
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.