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

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.

Fitted to model families

Britten-Norman BN-28B-N Group Ltd BN-2A-261Britten-Norman Ltd BN-2A-261Deloach Harry RV-101Ernst Robert E ERNST PITTS S2BE1Pilatus Britten-Norman BN-2B-261Pilatus Britten-Norman Limited BN-2B-271Pilatus Britten-Norman Ltd. BN-21

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

Puerto Rico8Florida3New York1Maryland1Kansas1Idaho1

Kind of aircraft

Piston twins13 (87%)Piston singles2 (13%)

When the aircraft were built by decade

024572196071970419801199012000

What the FAA has certified, ordered and been told about the Lycoming O-540-E4C5 the component layer

No FAA order in the current files names 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.

Failure reports 139 since · what operators and shops told the FAA

0491418950005101521126

Parts most often reported as the reports name them

Bearing12Magneto7Crankshaft6Crankcase5Engine5Gear5Shaft5Cylinder4Bracket3Brake Disc3

Latest reports

2026-06-16Rudder: no discrepancy
2025-08-15Engine: failed
2025-07-02Idler Gear: damaged
2025-06-30Spark Plug: faulted
2025-04-25Shaft: broken

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-540-e4c5.json · about the eFlight graph.

Aircraft newest certificates first · 15

Tail no.Maker and modelGroupOwner and baseCertificateRegisteredStatus
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), October 5, 2026. Horsepower and thrust are the FAA's figures for the series, not for a particular aircraft.