| Tail Number / N-Number | N6021K |
| Manufacturer | CESSNA |
| Model | 172S |
| Year Built | 2006 |
| Manufacturer's Serial Number | 172S10181 |
| Aircraft Type | Fixed wing single engine |
| Category | Land |
| Builder Certification | Type Certificated |
| Number of Seats | 4 seats |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Engine Manufacturer | LYCOMING |
| Engine Model | IO-360-L2A |
| Engine Type | Reciprocating |
| Number of Engines | 1 engine |
| Horsepower | 180 hp (134 kW) |
| Type of Registrant | LLC |
| Owner Name | GFK LEASING LLC |
| Street | 2403 AIR CARGO DR |
| City | GRAND FORKS |
| State | ND |
| Zip Code | 58203-8944 |
| Region | Great Lakes |
| County | Grand Forks County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Standard |
| Airworthiness Date | 2006-05-12 |
| Certificate Issue Date | 2015-11-30 |
| Last Action Date | 2021-08-13 |
| Expiration Date | 2028-11-30 |
| Status | Valid Registration |
| Mode S Code | 51750462 |
| Mode S Code Hex | A7D132 |
Deregistered Aircraft 1 of 2. This aircraft was previously assigned the N-number N6021K.
| Tail Number / N-Number | N6021K |
| Manufacturer | BEECH |
| Model | 76 |
| Manufacturer's Serial Number | ME-169 |
| Aircraft Type | Fixed wing multi engine |
| Category | Land |
| Builder Certification | Type Certificated |
| Number of Seats | 4 seats |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Number of Engines | 2 engines |
| Type of Registrant | Corporation |
| Owner Name | CATSKILL AIRWAYS INC |
| Street | R D 1 |
| City | ONEONTA |
| State | NY |
| Zip Code | 13820 |
| Region | Eastern |
| County | Grand Forks County |
| Certificate Issue Date | 1979-03-27 |
| Last Status | Valid Registration |
| Cancellation Date | 1981-03-18 |
| Exported To | UNITED KINGDOM |
Deregistered Aircraft 2 of 2. This aircraft was previously assigned the N-number N6021K.
| Tail Number / N-Number | N6021K |
| Manufacturer | REPUBLIC |
| Model | RC-3 |
| Manufacturer's Serial Number | 191 |
| Aircraft Type | Fixed wing single engine |
| Category | Amphibian |
| Builder Certification | Type Certificated |
| Number of Seats | 4 seats |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Number of Engines | 1 engine |
| Average Cruising Speed | 87 miles per hour |
| Type of Registrant | Individual |
| Owner Name | HAGERMAN WILLIAM F JR |
| Street | 716 TERRACE DRIVE |
| City | CLINTON |
| State | IA |
| Zip Code | 52732 |
| Region | Central |
| County | Grand Forks County |
| Certificate Issue Date | 1953-06-12 |
| Last Status | Valid Registration |
| Cancellation Date | 1953-09-22 |