Lycoming O-540-A4C5
1 aircraft on the U.S. register carry a Lycoming O-540-A4C5 engine, rated at about 250 horsepower. The Britten-Norman BN-2 is the model most often fitted with it (1 aircraft).
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-A4C5. FAA spelling: O-540-A4C5.
Where they are owner's state
Kind of aircraft
What the FAA has certified, ordered and been told about the Lycoming O-540-A4C5 the component layer
The design is held under 1 type certificate (E-295, held by Lycoming Engines). The FAA has issued 18 airworthiness directives (orders that owners must comply with) that name this engine series. Operators and repair shops have filed 1 failure report with the FAA since 1995, 1 of them in the last ten years.
FAA orders 18 airworthiness directives · newest first
Failure reports 1 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
- Britten-Norman BN-2 1 with this engine series
- Rhode Island 1 of these aircraft
- New England Airlines INC 1 of these aircraft
- FAA orders naming the Lycoming O-540-A4C5 18 airworthiness directives
- Failure reports on the Lycoming O-540-A4C5 1 reports since 1995
These connections as data: /graph/engine/lycoming-o-540-a4c5.json · about the eFlight graph.
Aircraft newest certificates first · 1
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.