| Tail Number / N-Number | N503MX |
| Manufacturer | BONZER MARK |
| Model | MXL |
| Year Built | 2020 |
| Manufacturer's Serial Number | 0104 |
| Aircraft Type | Fixed wing single engine |
| Category | Land |
| Builder Certification | Not Type Certificated |
| Number of Seats | 1 seat |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Engine Manufacturer | ROTAX |
| Engine Model | 503 SERIES |
| Engine Type | 2 Cycle |
| Number of Engines | 1 engine |
| Horsepower | 52 hp (39 kW) |
| Type of Registrant | Individual |
| Owner Name | BONZER MARK A |
| Street | 2630 210TH ST |
| City | CHARLES CITY |
| State | IA |
| Zip Code | 50616-8952 |
| Region | Central |
| County | Floyd County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Experimental |
| Airworthiness Date | 2020-04-22 |
| Certificate Issue Date | 2020-02-28 |
| Last Action Date | 2022-09-21 |
| Expiration Date | 2030-02-28 |
| Status | Valid Registration |
| Mode S Code | 51443076 |
| Mode S Code Hex | A6463E |
Deregistered Aircraft 1 of 1. This aircraft was previously assigned the N-number N503MX.
| Tail Number / N-Number | N503MX |
| Manufacturer | FILER TED H III |
| Model | MINI-MAX EROS |
| Manufacturer's Serial Number | 20672 |
| Aircraft Type | Fixed wing single engine |
| Category | Land |
| Builder Certification | Not Type Certificated |
| Number of Seats | 1 seat |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Number of Engines | 1 engine |
| Type of Registrant | Individual |
| Owner Name | FILER TED H III |
| Street | 15907 LAKEVIEW DR |
| City | BAYTOWN |
| State | TX |
| Zip Code | 77520-9382 |
| County | Floyd County |
| Country | US |
| Certificate Issue Date | 2002-05-15 |
| Last Action Date | 2005-05-17 |
| Last Status | The Triennial Aircraft Registration form was mailed and has not been returned by the Post Office |
| Cancellation Date | 2005-06-14 |