| Tail Number / N-Number | N921JC |
| Manufacturer | COFFEY JEFF |
| Model | SONEX |
| Year Built | 2002 |
| Manufacturer's Serial Number | 108 |
| 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) |
| Engine Manufacturer | AMA/EXPR |
| Engine Model | UNKNOWN ENG |
| Number of Engines | 1 engine |
| Type of Registrant | Individual |
| Owner Name | COFFEY JEFF F |
| Street | 2812 W 55TH ST |
| City | MINNEAPOLIS |
| State | MN |
| Zip Code | 55410-2426 |
| Region | Great Lakes |
| County | Hennepin County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Experimental |
| Airworthiness Date | 2002-10-17 |
| Certificate Issue Date | 2016-08-08 |
| Last Action Date | 2022-06-30 |
| Expiration Date | 2029-08-31 |
| Status | Valid Registration |
| Mode S Code | 53141254 |
| Mode S Code Hex | ACC2AC |