| Tail Number / N-Number | N121AQ |
| Manufacturer | CESSNA |
| Model | 421C |
| Manufacturer's Serial Number | 421C1063 |
| Aircraft Type | Fixed wing multi engine |
| Category | Land |
| Builder Certification | Type Certificated |
| Number of Seats | 8 seats |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Number of Engines | 2 engines |
| Average Cruising Speed | 90 miles per hour |
| Type of Registrant | Individual |
| Owner Name | PACKER WILLIAM M III TRUSTEE |
| Street | 3770 PINE LAKE KNOLL DR |
| City | ORCHARD LAKE |
| State | MI |
| Zip Code | 48324-1666 |
| Region | Great Lakes |
| County | Oakland County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Standard |
| Airworthiness Date | 1981-04-30 |
| Certificate Issue Date | 2015-04-28 |
| Last Action Date | 2020-12-17 |
| Expiration Date | 2028-04-30 |
| Status | Valid Registration |
| Mode S Code | 50053570 |
| Mode S Code Hex | A05778 |