| Tail Number / N-Number | N21NK |
| Manufacturer | PIPER |
| Model | PA-22-135 |
| Year Built | 1953 |
| Manufacturer's Serial Number | 22-1186 |
| 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 | 0-290 SERIES |
| Engine Type | Reciprocating |
| Number of Engines | 1 engine |
| Horsepower | 140 hp (104 kW) |
| Average Cruising Speed | 94 miles per hour |
| Type of Registrant | Individual |
| Owner Name | PLISS WAYNE A |
| Street | 2205 FAIRWAY DR |
| City | DUNCAN |
| State | OK |
| Zip Code | 73533-3209 |
| Region | Southwestern |
| County | Stephens County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Standard |
| Airworthiness Date | 1956-05-29 |
| Certificate Issue Date | 2020-11-12 |
| Last Action Date | 2022-10-25 |
| Expiration Date | 2027-11-30 |
| Status | Valid Registration |
| Mode S Code | 50334137 |
| Mode S Code Hex | A1B85F |
Deregistered Aircraft 1 of 1. This aircraft was previously assigned the N-number N21NK.
| Tail Number / N-Number | N21NK |
| Manufacturer | LUSCOMBE |
| Model | 8A |
| Manufacturer's Serial Number | 2908 |
| Aircraft Type | Fixed wing single engine |
| Category | Land |
| Builder Certification | 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 |
| Average Cruising Speed | 86 miles per hour |
| Type of Registrant | Corporation |
| Owner Name | CLASSIC FLYERS INC |
| Street | 2310 UNION AVE |
| City | CHICAGO HEIGHTS |
| State | IL |
| Zip Code | 60411 |
| County | Stephens County |
| Country | US |
| Certificate Issue Date | 1985-11-19 |
| Last Action Date | 1985-11-20 |
| Last Status | Valid Registration |
| Cancellation Date | 1991-01-08 |
| Exported To | UNITED KINGDOM |