Deregistered Aircraft 1 of 1. This aircraft was previously assigned the N-number N503QC.
| Tail Number / N-Number | N503QC |
| Manufacturer | BIRKHEAD DAVID E |
| Model | CHALLENGER I SPECIAL |
| Year Built | 2001 |
| Manufacturer's Serial Number | 0798-CW-0695 |
| 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 | SEE BOMBADIER |
| Engine Type | Reciprocating |
| Number of Engines | 1 engine |
| Kit Manufacturer | QUAD CITY ULTRALIGHT ACFT CORP |
| Kit Model | CHALLENGER 1 SPEC |
| Type of Registrant | Individual |
| Owner Name | SALE REPORTED |
| Street | 752 STONEMILL DR |
| City | GREENWOOD |
| State | IN |
| Zip Code | 46143-8442 |
| Country | US |
| Airworthiness Classification | Experimental |
| Airworthiness Date | 2001-07-16 |
| Last Action Date | 2011-06-27 |
| Last Status | Sale Reported – Pending Cancellation |
| Cancellation Date | 2013-05-15 |
| Mode S Code | 51443166 |
| Mode S Code Hex | A64676 |