| Tail Number / N-Number | N503DB |
| Manufacturer | QUAD CITY ULTRALIGHTS |
| Model | CHALLENGER II |
| Year Built | 2007 |
| Manufacturer's Serial Number | CH2-0397-1586 |
| Aircraft Type | Fixed wing single engine |
| Category | Amphibian |
| Builder Certification | Light Sport |
| Number of Seats | 2 seats |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Engine Manufacturer | ROTAX |
| Engine Model | 503 DCDI |
| Engine Type | 2 Cycle |
| Number of Engines | 1 engine |
| Horsepower | 52 hp (39 kW) |
| Type of Registrant | Individual |
| Owner Name | TORRES KILGORE PABLO L |
| Street | 7543 CHARLIN PKWY |
| City | ORLANDO |
| State | FL |
| Zip Code | 32822-6401 |
| Region | Southern |
| County | Orange County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Experimental |
| Airworthiness Date | 2010-01-28 |
| Certificate Issue Date | 2016-06-09 |
| Last Action Date | 2022-01-18 |
| Expiration Date | 2029-06-30 |
| Status | Valid Registration |
| Mode S Code | 51442542 |
| Mode S Code Hex | A64562 |
Deregistered Aircraft 1 of 2. This aircraft was previously assigned the N-number N503DB.
| Tail Number / N-Number | N503DB |
| Manufacturer | BATMAN WILBUR D |
| Model | CHALLENGER II |
| Year Built | 1991 |
| Manufacturer's Serial Number | 90CW0554 |
| Aircraft Type | Fixed wing single engine |
| Category | Land |
| Builder Certification | Not Type Certificated |
| Number of Seats | 2 seats |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Engine Manufacturer | BOMBARDIER |
| Engine Model | ROTAX (ALL) |
| Engine Type | Reciprocating |
| Number of Engines | 1 engine |
| Type of Registrant | Individual |
| Owner Name | HINRICKS JAMES M |
| Street | 3525 ERNAL DR |
| City | SHOREVIEW |
| State | MN |
| Zip Code | 55126 |
| County | Orange County |
| Country | US |
| Airworthiness Classification | Experimental |
| Airworthiness Date | 1991-05-24 |
| Certificate Issue Date | 1999-05-03 |
| Last Action Date | 2002-04-16 |
| Last Status | The Triennial Aircraft Registration form was mailed and has not been returned by the Post Office |
| Cancellation Date | 2002-05-20 |
Deregistered Aircraft 2 of 2. This aircraft was previously assigned the N-number N503DB.
| Tail Number / N-Number | N503DB |
| Manufacturer | BATMAN WILBUR D |
| Model | CHALLENGER II |
| Manufacturer's Serial Number | CH20586B0198 |
| Aircraft Type | Fixed wing single engine |
| Category | Land |
| Builder Certification | Not Type Certificated |
| Number of Seats | 2 seats |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Number of Engines | 1 engine |
| County | Orange County |
| Last Status | The Triennial Aircraft Registration form was mailed and has not been returned by the Post Office |
| Cancellation Date | 1990-08-14 |