The U.S. aircraft register, updated daily
Engines · two-cycle piston · data as of October 23, 2026

Rotax 503DC

18 aircraft on the U.S. register carry a Rotax 503DC engine, rated at about 52 horsepower. The Abbott John R CH2CW is the model most often fitted with it (1 aircraft). The aircraft carrying it were built between 1985 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 Rotax 503DC. FAA spelling: 503DC.

Fitted to model families

Abbott John R CH2CW1Air Trikes Enterprises EAGLE1Cassetta Thomas F Jr CHALLENGER II1Clegg Marvin MXL II SPORT1Fant Jonathan ROTOR LIGHTNING1Heideberg Designs Llc 1999 EXPRESS1Jelinek Vladimir CHALLENGER II1Levings Margaret CHALLENGER II1Lockemeyer Robert B QUICKSILVER GT4001Maxair DRIFTER XP5031Maxair Aircraft Corp DRIFTER1New Avenger Aircraft AIRPLANE1
Model families, as a table
aircraft
Abbott John R CH2CW1
Air Trikes Enterprises EAGLE1
Cassetta Thomas F Jr CHALLENGER II1
Clegg Marvin MXL II SPORT1
Fant Jonathan ROTOR LIGHTNING1
Heideberg Designs Llc 1999 EXPRESS1
Jelinek Vladimir CHALLENGER II1
Levings Margaret CHALLENGER II1
Lockemeyer Robert B QUICKSILVER GT4001
Maxair DRIFTER XP5031
Maxair Aircraft Corp DRIFTER1
New Avenger Aircraft AIRPLANE1

Abbott John R CH2CW · Air Trikes Enterprises EAGLE · Cassetta Thomas F Jr CHALLENGER II · Clegg Marvin MXL II SPORT · Fant Jonathan ROTOR LIGHTNING · Heideberg Designs Llc 1999 EXPRESS · Jelinek Vladimir CHALLENGER II · Levings Margaret CHALLENGER II · Lockemeyer Robert B QUICKSILVER GT400 · Maxair DRIFTER XP503

When the aircraft were built by decade

By decade built, as a table
aircraft
19803
19905
20007

Connections how this engine series links to the rest of the register

Fitted to
Where they are

The whole map of how records connect · these connections as data: /graph/engine/rotax-503dc.json.

Aircraft newest certificates first · 18

Tail no.Maker and modelGroupOwner and baseCertificateRegisteredStatus
N415MB Abbott John R
CH2CW
Fixed-wing, single engine Individual owner
Florida
Experimental 2026-04-23 ValidFAA registration status code V: Valid registration. All codes
N855LL Cassetta Thomas F Jr
CHALLENGER II
Fixed-wing, single engine Individual owner
New York
Experimental 2025-07-11 ValidFAA registration status code V: Valid registration. All codes
N342TM Levings Margaret
CHALLENGER II
Fixed-wing, single engine Individual owner
Tennessee
Experimental 2025-03-25 ValidFAA registration status code V: Valid registration. All codes
N2513S New Avenger Aircraft
AIRPLANE
Fixed-wing, single engine Individual owner
Texas
Experimental 2025-01-21 ValidFAA registration status code V: Valid registration. All codes
N1944X Jelinek Vladimir
CHALLENGER II
Fixed-wing, single engine Individual owner
Wisconsin
Experimental 2024-04-25 ValidFAA registration status code V: Valid registration. All codes
N80719 Maxair Aircraft Corp
DRIFTER
Fixed-wing, single engine Individual owner
Michigan
Experimental 2023-01-06 ValidFAA registration status code V: Valid registration. All codes
N4317U Rolston Ned
CHALLENGER II
Fixed-wing, single engine Individual owner
Indiana
Experimental 2022-07-23 ValidFAA registration status code V: Valid registration. All codes
N3283N Northwing Design
APACHE SPORT
Weight-shift control Individual owner
Pennsylvania
Experimental 2022-04-25 ValidFAA registration status code V: Valid registration. All codes
N8606A Maxair
DRIFTER XP503
Fixed-wing, single engine Individual owner
Florida
Experimental 2020-07-13 ValidFAA registration status code V: Valid registration. All codes
N964J Heideberg Designs Llc
1999 EXPRESS
Powered parachute Individual owner
Kentucky
Experimental 2016-05-05 ValidFAA registration status code V: Valid registration. All codes
N318MC Clegg Marvin
MXL II SPORT
Fixed-wing, single engine Individual owner
North Carolina
Experimental 2014-11-14 ValidFAA registration status code V: Valid registration. All codes
N719VC Fant Jonathan
ROTOR LIGHTNING
Gyroplane Individual owner
Arizona
Experimental 2014-10-24 ValidFAA registration status code V: Valid registration. All codes
N901GH Quad City/Houston Greg
CHALLENGER II
Fixed-wing, single engine Individual owner
Washington
Experimental 2014-08-19 ValidFAA registration status code V: Valid registration. All codes
N5142F Quad City Ultralight Acft Corp
CHALLENGER II SPEC
Fixed-wing, single engine Individual owner
Illinois
Experimental 2011-04-06 ValidFAA registration status code V: Valid registration. All codes
N6056B Lockemeyer Robert B
QUICKSILVER GT400
Fixed-wing, single engine Individual owner
New York
Experimental 2007-10-04 ValidFAA registration status code V: Valid registration. All codes
N163AB Air Trikes Enterprises
EAGLE
Weight-shift control Individual owner
Arizona
Experimental 2007-09-06 ValidFAA registration status code V: Valid registration. All codes
N55012 Quicksilver
MXL II
Fixed-wing, single engine Individual owner
Alabama
Experimental 2007-09-06 ValidFAA registration status code V: Valid registration. All codes
N9148R Preston Lawrence D
BEAVER RX-550
Fixed-wing, single engine Individual owner
California
Experimental 2006-12-12 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 23, 2026. Horsepower and thrust are the FAA's figures for the series, not for a particular aircraft.