| Tail Number / N-Number | N21668 |
| Manufacturer | PIPER |
| Model | J3C-65 |
| Year Built | 1938 |
| Manufacturer's Serial Number | 2555 |
| 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) |
| Engine Manufacturer | CONT MOTOR |
| Engine Model | A&C65 SERIES |
| Engine Type | Reciprocating |
| Number of Engines | 1 engine |
| Horsepower | 65 hp (48 kW) |
| Average Cruising Speed | 67 miles per hour |
| Type of Registrant | Individual |
| Owner Name | SIBRA RAY W |
| Street | 4612 JUDITH LANDING RD |
| City | BIG SANDY |
| State | MT |
| Zip Code | 59520-8212 |
| Region | Northwest Mountain |
| County | Chouteau County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Standard |
| Airworthiness Date | 1956-07-13 |
| Certificate Issue Date | 2003-01-15 |
| Last Action Date | 2022-03-12 |
| Expiration Date | 2029-05-31 |
| Status | Valid Registration |
| Mode S Code | 50351427 |
| Mode S Code Hex | A1D317 |