Lycoming O-540-E4A5
9 aircraft on the U.S. register carry a Lycoming O-540-E4A5 engine, rated at about 260 horsepower. The Siai-Marchetti F.260 is the model most often fitted with it (2 aircraft). The aircraft carrying it were built between 1964 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-540-E4A5. FAA spelling: O-540-E4A5.
Fitted to model families
Siai-Marchetti F.260 · Brent Huddleston BEARHAWK MODEL B · Erb Russell E BEARHAWK · Piper PA-24 Comanche · Piper PA-32 Cherokee Six, Lance and Saratoga · Siai-Marchetti F.260C · Siai-Marchetti F260D · Stenton Maddox AVIPRO BEARHAWK
Where they are owner's state
Kind of aircraft
When the aircraft were built by decade
What the FAA has certified, ordered and been told about the Lycoming O-540-E4A5 the component layer
The design is held under 1 type certificate (E-295, 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 4 failure reports with the FAA since 1995, 1 of them in the last ten years.
FAA orders 24 airworthiness directives · newest first
Failure reports 4 since · what operators and shops told the FAA
Parts most often reported as the reports name them
Latest reports
Certificates and bulletins
Safety bulletins 6 · advice, not orders
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
- Siai-Marchetti F.260 2 with this engine series
- Piper PA-24 Comanche 1 with this engine series
- Piper PA-32 Cherokee Six, Lance and Saratoga 1 with this engine series
- Siai-Marchetti F.260C 1 with this engine series
- Texas 3 of these aircraft
- California 2 of these aircraft
- Wyoming 1 of these aircraft
- Virginia 1 of these aircraft
- Ohio 1 of these aircraft
- Southern Aircraft Consultancy INC Trustee 1 of these aircraft
- Eastern Stearman INC Trustee 1 of these aircraft
- FAA orders naming the Lycoming O-540-E4A5 24 airworthiness directives
- Failure reports on the Lycoming O-540-E4A5 4 reports since 1995
These connections as data: /graph/engine/lycoming-o-540-e4a5.json · about the eFlight graph.
Aircraft newest certificates first · 9
| Tail no. | Maker and model | Group | Owner and base | Certificate | Registered | Status |
|---|---|---|---|---|---|---|
| N164LL | Piper PA-32-260 |
Fixed-wing, single engine | Southern Aircraft Consultancy INC Trustee Casper, Wyoming |
Standard | 2026-02-06 | ValidFAA registration status code V: Valid registration. All codes |
| N85BH | Brent Huddleston BEARHAWK MODEL B |
Fixed-wing, single engine | Individual owner Ohio |
Experimental | 2025-10-09 | ValidFAA registration status code V: Valid registration. All codes |
| N91BL | Siai-Marchetti F260D |
Fixed-wing, single engine | Lloyd Aviation LLC Spring Branch, Texas |
Standard | 2024-10-21 | ValidFAA registration status code V: Valid registration. All codes |
| N260MT | Siai-Marchetti F.260 |
Fixed-wing, single engine | Individual owner California |
Experimental | 2024-04-24 | ValidFAA registration status code V: Valid registration. All codes |
| N628SD | Stenton Maddox AVIPRO BEARHAWK |
Fixed-wing, single engine | Co-owned owner Texas |
Experimental | 2023-12-07 | ValidFAA registration status code V: Valid registration. All codes |
| N266SF | Siai-Marchetti F.260 |
Fixed-wing, single engine | Eastern Stearman INC Trustee Leesburg, Virginia |
Standard | 2023-01-03 | ValidFAA registration status code V: Valid registration. All codes |
| N26FD | Siai Marchetti F.260C |
Fixed-wing, single engine | Abnc Air LLC Wellington, Florida |
Standard | 2020-07-27 | ValidFAA registration status code V: Valid registration. All codes |
| N8549P | Piper PA-24-260 |
Fixed-wing, single engine | West Texas Weather Modification Association San Angelo, Texas |
Experimental | 2011-01-25 | ValidFAA registration status code V: Valid registration. All codes |
| N6786E | Erb Russell E BEARHAWK |
Fixed-wing, single engine | Individual owner California |
Experimental | 2006-03-09 | 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.