Lycoming O-540-E4C5
15 aircraft on the U.S. register carry a Lycoming O-540-E4C5 engine, rated at about 250 horsepower. The Britten-Norman BN-2 is the model most often fitted with it (8 aircraft). The aircraft carrying it were built between 1968 and 2008.
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-E4C5. FAA spelling: O-540-E4C5.
Fuel: 100LL avgas.
Fitted to model families
Model families, as a table
| aircraft | |
|---|---|
| Britten-Norman BN-2 | 8 |
| B-N Group Ltd BN-2A-26 | 1 |
| Britten-Norman Ltd BN-2A-26 | 1 |
| Deloach Harry RV-10 | 1 |
| Ernst Robert E ERNST PITTS S2BE | 1 |
| Pilatus Britten-Norman BN-2B-26 | 1 |
| Pilatus Britten-Norman Limited BN-2B-27 | 1 |
| Pilatus Britten-Norman Ltd. BN-2 | 1 |
Britten-Norman BN-2 · B-N Group Ltd BN-2A-26 · Britten-Norman Ltd BN-2A-26 · Deloach Harry RV-10 · Ernst Robert E ERNST PITTS S2BE · Pilatus Britten-Norman BN-2B-26 · Pilatus Britten-Norman Limited BN-2B-27 · Pilatus Britten-Norman Ltd. BN-2
Where they are owner's state
Kind of aircraft
By kind, as a table
| aircraft | share | |
|---|---|---|
| Piston twins | 13 | 87% |
| Piston singles | 2 | 13% |
What the FAA has certified, ordered and been told about the Lycoming O-540-E4C5 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 139 failure reports with the FAA since 1995, 18 of them in the last ten years.
FAA orders 24 airworthiness directives · newest first
Failure reports 139 since · what operators and shops told the FAA
Failure reports by year, as a table
| reports | |
|---|---|
| 95 | 4 |
| 96 | 13 |
| 97 | 18 |
| 98 | 12 |
| 99 | 14 |
| 00 | 7 |
| 01 | 3 |
| 02 | 4 |
| 03 | 3 |
| 04 | 7 |
| 05 | 5 |
| 06 | 4 |
| 07 | 1 |
| 08 | 4 |
| 09 | 1 |
| 10 | 2 |
| 11 | 3 |
| 12 | 3 |
| 13 | 4 |
| 14 | 5 |
| 15 | 3 |
| 16 | 1 |
| 17 | 3 |
| 19 | 1 |
| 20 | 2 |
| 21 | 1 |
| 22 | 2 |
| 23 | 2 |
| 24 | 1 |
| 25 | 5 |
| 26 | 1 |
Parts most often reported as the reports name them
Parts most reported, as a table
| reports | |
|---|---|
| Bearing | 12 |
| Magneto | 7 |
| Crankshaft | 6 |
| Crankcase | 5 |
| Engine | 5 |
| Gear | 5 |
| Shaft | 5 |
| Cylinder | 4 |
| Bracket | 3 |
| Brake Disc | 3 |
Latest reports
Approved replacement parts 24 parts manufacturer approvals
Parts a company other than the maker may make for this engine and sell as FAA-approved. The companies holding the most:
Most often: magneto (8), harness (6), control valve (2), tach breaker (1), scavenge pump (1), machining (1), impulse coupling (1).
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
- Britten-Norman BN-2 8 with this engine series
- Pilatus Britten-Norman Ltd. BN-2 1 with this engine series
- Puerto Rico 8 of these aircraft
- Florida 3 of these aircraft
- New York 1 of these aircraft
- Maryland 1 of these aircraft
- Kansas 1 of these aircraft
- Air Charter INC DBA 4 of these aircraft
- Islander Holdings LTD 2 of these aircraft
- FAA orders naming the Lycoming O-540-E4C5 24 airworthiness directives
- Failure reports on the Lycoming O-540-E4C5 139 reports since 1995
The whole map of how records connect · these connections as data: /graph/engine/lycoming-o-540-e4c5.json.
Aircraft newest certificates first · 15
| Tail no. | Maker and model | Group | Owner and base | Certificate | Registered | Status |
|---|---|---|---|---|---|---|
| N910VL | Britten-Norman BN-2A |
Fixed-wing, multi-engine | Blue Waters Air Chaters LLC San Juan, Puerto Rico |
Standard | 2026-04-02 | ValidFAA registration status code V: Valid registration. All codes |
| N908GD | Britten-Norman BN2A-26 ISLANDER |
Fixed-wing, multi-engine | Corpus Terra Investments LLC Hialeah, Florida |
Standard | 2025-09-10 | ValidFAA registration status code V: Valid registration. All codes |
| N881GL | Britten-Norman Ltd BN-2A-26 |
Fixed-wing, multi-engine | Actualized Business Solutions INC DBA California, Maryland |
Standard | 2023-06-01 | ValidFAA registration status code V: Valid registration. All codes |
| N519LG | Britten-Norman BN2A-26 ISLANDER |
Fixed-wing, multi-engine | Sawtooth Flying Service INC Mccall, Idaho |
Standard | 2023-02-22 | ValidFAA registration status code V: Valid registration. All codes |
| N921GD | Britten-Norman BN-2A-8 |
Fixed-wing, multi-engine | Air Charter INC DBA Culebra, Puerto Rico |
Standard | 2022-10-18 | ValidFAA registration status code V: Valid registration. All codes |
| N298TA | Britten-Norman BN-2A-27 |
Fixed-wing, multi-engine | Islander Holdings LTD Fort Lauderdale, Florida |
Standard | 2022-06-06 | ValidFAA registration status code V: Valid registration. All codes |
| N324TA | B-N Group Ltd BN-2A-26 |
Fixed-wing, multi-engine | Islander Holdings LTD Fort Lauderdale, Florida |
Standard | 2021-12-02 | ValidFAA registration status code V: Valid registration. All codes |
| N142JH | Deloach Harry RV-10 |
Fixed-wing, single engine | Paroaria LLC Williamsville, New York |
Experimental | 2016-12-13 | ValidFAA registration status code V: Valid registration. All codes |
| N920GD | Britten Norman BN-2A MK III |
Fixed-wing, multi-engine | Air Charter INC DBA Culebra, Puerto Rico |
Standard | 2016-06-02 | ValidFAA registration status code V: Valid registration. All codes |
| N864VL | Britten-Norman BN-2A-9 |
Fixed-wing, multi-engine | Vieques Air Link INC San Juan, Puerto Rico |
Standard | 2016-05-27 | ValidFAA registration status code V: Valid registration. All codes |
| N6238C | Ernst Robert E ERNST PITTS S2BE |
Fixed-wing, single engine | Individual owner Kansas |
Experimental | 2016-02-04 | ValidFAA registration status code V: Valid registration. All codes |
| N908VL | Pilatus Britten-Norman BN-2B-26 |
Fixed-wing, multi-engine | Blue Waters Air Charters LLC San Juan, Puerto Rico |
Standard | 2015-09-28 | ValidFAA registration status code V: Valid registration. All codes |
| N913GD | Britten-Norman BN-2A-8 |
Fixed-wing, multi-engine | Air Charter INC DBA Culebra, Puerto Rico |
Standard | 2009-10-08 | ValidFAA registration status code V: Valid registration. All codes |
| N907GD | Pilatus Britten-Norman Ltd. BN-2A-26 |
Fixed-wing, multi-engine | Air Charter INC DBA Culebra, Puerto Rico |
Standard | 2006-02-23 | ValidFAA registration status code V: Valid registration. All codes |
| N865VL | Pilatus Britten-Norman Limited BN-2B-27 |
Fixed-wing, multi-engine | Individual owner Puerto Rico |
Standard | Sale reportedFAA registration status code 7. All codes |
Source: FAA Civil Aviation Registry, Releasable Aircraft Database (the engine reference table and each aircraft's engine code), November 10, 2026. Horsepower and thrust are the FAA's figures for the series, not for a particular aircraft.