| Tail Number / N-Number | N603AK |
| Manufacturer | SCHEMPP-HIRTH FLUGZEUGBAU GMBH |
| Model | NIMBUS-3D |
| Year Built | 1994 |
| Manufacturer's Serial Number | 14 |
| Aircraft Type | Glider |
| 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 | NONE |
| Engine Model | NONE |
| Number of Engines | 0 engines |
| Type of Registrant | Individual |
| Owner Name | KUNDEL ANDREW R |
| Street | 1200 NORTHWOOD LN |
| City | MUSCATINE |
| State | IA |
| Zip Code | 52761-4628 |
| Region | Central |
| County | Muscatine County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Experimental |
| Airworthiness Date | 2022-09-09 |
| Certificate Issue Date | 2022-05-02 |
| Last Action Date | 2022-05-02 |
| Expiration Date | 2029-05-31 |
| Status | Valid Registration |
| Mode S Code | 51751156 |
| Mode S Code Hex | A7D26E |
Deregistered Aircraft 1 of 1. This aircraft was previously assigned the N-number N603AK.
| Tail Number / N-Number | N603AK |
| Manufacturer | KISKIS KENNETH P |
| Model | CHALLENGER II |
| Manufacturer's Serial Number | 0889-0450 |
| 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 |
| Kit Manufacturer | QUAD CITY ULTRALIGHT ACFT CORP |
| Kit Model | CHALLENGER II |
| County | Muscatine County |
| Last Action Date | 2005-03-03 |
| Last Status | N-Number assigned as a Non Type Certificated (Amateur) but has not been registered that is pending cancellation |
| Cancellation Date | 2011-06-06 |