Lycoming IO-540-W1A5D
8 aircraft on the U.S. register carry a Lycoming IO-540-W1A5D engine, rated at about 235 horsepower. The Maule M-7 is the model most often fitted with it (4 aircraft). The aircraft carrying it were built between 1981 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-W1A5D. FAA spelling: IO-540-W1A5D.
Fitted to model families
Maule M-7 · Maule MT-7 · Maule M-6 · Rob Finch MAULE M-7 JAEGER
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-W1A5D the component layer
The design is held under 1 type certificate (1E4, held by Lycoming Engines). The FAA has issued 26 airworthiness directives (orders that owners must comply with) that name this engine series.
FAA orders 26 airworthiness directives · newest first
Certificates and bulletins
Safety bulletins 8 · 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
- Maule M-7 4 with this engine series
- Maule MT-7 2 with this engine series
- Maule M-6 1 with this engine series
- Taf Aerial Services LLC 1 of these aircraft
- Sugarbush Soaring Association INC 1 of these aircraft
- Knight Air LLC 1 of these aircraft
- FAA orders naming the Lycoming IO-540-W1A5D 26 airworthiness directives
These connections as data: /graph/engine/lycoming-io-540-w1a5d.json · about the eFlight graph.
Aircraft newest certificates first · 8
| Tail no. | Maker and model | Group | Owner and base | Certificate | Registered | Status |
|---|---|---|---|---|---|---|
| N622LH | Maule MT-7-235 |
Fixed-wing, single engine | Sugarbush Soaring Association INC Warren, Vermont |
Standard | 2026-07-23 | ValidFAA registration status code V: Valid registration. All codes |
| N9226N | Maule M-7-235 |
Fixed-wing, single engine | Gods Country Aircraft LLC Trapper Creek, Alaska |
Standard | 2026-06-09 | ValidFAA registration status code V: Valid registration. All codes |
| N4269B | Maule MT-7-235 |
Fixed-wing, single engine | Northeast Aviation LLC Bynum, Texas |
Standard | 2026-03-01 | ValidFAA registration status code V: Valid registration. All codes |
| N245LG | Maule M-7-235 |
Fixed-wing, single engine | Knight Air LLC Anchorage, Alaska |
Standard | 2025-09-25 | ValidFAA registration status code V: Valid registration. All codes |
| N907RF | Rob Finch MAULE M-7 JAEGER |
Fixed-wing, single engine | Individual owner Alaska |
Experimental | 2023-03-16 | ValidFAA registration status code V: Valid registration. All codes |
| N730MW | Maule M-7-235 |
Fixed-wing, single engine | Individual owner Texas |
Standard | 2019-06-19 | ValidFAA registration status code V: Valid registration. All codes |
| N609DD | Maule M-6-235 |
Fixed-wing, single engine | Individual owner Texas |
Standard | 2019-03-28 | ValidFAA registration status code V: Valid registration. All codes |
| N6129T | Maule M-7-235A |
Fixed-wing, single engine | Taf Aerial Services LLC Beeville, Texas |
Standard | 2009-03-18 | 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.