Lycoming IO-540-J4A5
9 aircraft on the U.S. register carry a Lycoming IO-540-J4A5 engine, rated at about 250 horsepower. The Piper PA-23 Apache and Aztec is the model most often fitted with it (2 aircraft). The aircraft carrying it were built between 1966 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 IO-540-J4A5. FAA spelling: IO-540-J4A5.
Fitted to model families
Piper PA-23 Apache and Aztec · Means Randy J RV 10 · Nelson John A NELSON SKYBOLT · Popiak Walter F RV-10 · Redding Steve F RIHN ACFT DR-109 · Vadim Khrupin RV-10 · Weinstock Steven R RV-10 · Woods Kenneth R RV-10
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 IO-540-J4A5 the component layer
The design is held under 1 type certificate (1E4, held by Lycoming Engines). The FAA has issued 37 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, 4 of them in the last ten years.
FAA orders 37 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
- Piper PA-23 Apache and Aztec 2 with this engine series
- U.S. Virgin Islands 1 of these aircraft
- Virginia 1 of these aircraft
- Texas 1 of these aircraft
- Kansas 1 of these aircraft
- Illinois 1 of these aircraft
- Csc Delaware Trust CO Trustee 1 of these aircraft
- FAA orders naming the Lycoming IO-540-J4A5 37 airworthiness directives
- Failure reports on the Lycoming IO-540-J4A5 4 reports since 1995
These connections as data: /graph/engine/lycoming-io-540-j4a5.json · about the eFlight graph.
Aircraft newest certificates first · 9
| Tail no. | Maker and model | Group | Owner and base | Certificate | Registered | Status |
|---|---|---|---|---|---|---|
| N33KW | Woods Kenneth R RV-10 |
Fixed-wing, single engine | Individual owner Colorado |
Experimental | 2025-10-14 | ValidFAA registration status code V: Valid registration. All codes |
| N384WP | Popiak Walter F RV-10 |
Fixed-wing, single engine | Rv7 Alpha LLC Mckinney, Texas |
Experimental | 2024-04-26 | ValidFAA registration status code V: Valid registration. All codes |
| N119VK | Vadim Khrupin RV-10 |
Fixed-wing, single engine | Individual owner California |
Experimental | 2023-04-03 | ValidFAA registration status code V: Valid registration. All codes |
| N6ZG | Piper PA-23-250 |
Fixed-wing, multi-engine | Tta Logistics LLC Christiansted, U.S. Virgin Islands |
Standard | 2020-08-28 | ValidFAA registration status code V: Valid registration. All codes |
| N52SW | Weinstock Steven R RV-10 |
Fixed-wing, single engine | Individual owner Illinois |
Experimental | 2019-09-26 | ValidFAA registration status code V: Valid registration. All codes |
| N311BB | Piper PA-23-250 |
Fixed-wing, multi-engine | Csc Delaware Trust CO Trustee Wilmington, Delaware |
Restricted | 2017-10-16 | ValidFAA registration status code V: Valid registration. All codes |
| N877SR | Redding Steve F RIHN ACFT DR-109 |
Fixed-wing, single engine | Individual owner Virginia |
Experimental | 2015-03-12 | ValidFAA registration status code V: Valid registration. All codes |
| N526JN | Nelson John A NELSON SKYBOLT |
Fixed-wing, single engine | Individual owner Kansas |
Experimental | 2012-08-22 | ValidFAA registration status code V: Valid registration. All codes |
| N595RV | Means Randy J RV 10 |
Fixed-wing, single engine | Yellow Bird Aviation LLC Austin, Arkansas |
Experimental | 2010-09-29 | 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.