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

Lycoming IO-540-M1B5D

2 aircraft on the U.S. register carry a Lycoming IO-540-M1B5D engine, rated at about 300 horsepower. The Eagle Aircraft Co EAGLE DW-1 is the model most often fitted with it (1 aircraft). The aircraft carrying it were built between 1982 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 IO-540-M1B5D. FAA spelling: IO-540-M1B5D.

Fitted to model families

Eagle Aircraft Co EAGLE DW-11Fultz Dale R MOOSE-35001

Eagle Aircraft Co EAGLE DW-1 · Fultz Dale R MOOSE-3500

Where they are owner's state

Pennsylvania1Montana1

Kind of aircraft

Piston singles2 (100%)

When the aircraft were built by decade

000111198012000

What the FAA has certified, ordered and been told about the Lycoming IO-540-M1B5D the component layer

The design is held under 1 type certificate (1E4, held by Lycoming Engines). The FAA has issued 28 airworthiness directives (orders that owners must comply with) that name this engine series.

FAA orders 28 airworthiness directives · newest first

2026-09-142026-17-10 · Reciprocating Engine Cylinder Section · engine
2026-04-082026-04-11 · Engine (Reciprocating) · engine
2024-12-052024-21-02 · Engine (Reciprocating) · engine
2015-11-032015-19-07 · Fuel injector fuel lines · engine
2012-10-242012-19-01 · Crankshafts · engine
2012-02-242012-03-06 · Fuel servo diaphragm · engine

All orders naming the Lycoming IO-540-M1B5D

Certificates and bulletins

1E4Type certificate held by Lycoming Engines · 81 models listed · revised February 28, 2018

Safety bulletins 8 · advice, not orders

2019-05-02NE-19-08 · Reciprocating Engine Cylinder Section - Lycoming Engines Parallel Valve Cylinders
2016-05-13NE-08-32R1 · Propeller Governor Idler Gear Shaft Set Screw
2014-03-24NE-14-13 · Reciprocating Engine - Cylinder Mounting Studs
2012-11-21NE-13-06 · Pushrod Shroud Spring Retainers, Engine Components Part No. AEL14995, for Lycoming Engines 320,...
2011-03-31NE-08-26R3 · Magneto/Distributor

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
Airworthiness

These connections as data: /graph/engine/lycoming-io-540-m1b5d.json · about the eFlight graph.

Aircraft newest certificates first · 2

Tail no.Maker and modelGroupOwner and baseCertificateRegisteredStatus
N8810T Eagle Aircraft Co
EAGLE DW-1
Fixed-wing, single engine C Fleet LLC
Missoula, Montana
Restricted 2021-11-22 ValidFAA registration status code V: Valid registration. All codes
N269DF Fultz Dale R
MOOSE-3500
Fixed-wing, single engine Individual owner
Pennsylvania
Experimental 2006-10-25 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.