| Tail Number / N-Number | N421ER |
| Manufacturer | CESSNA |
| Model | 172S |
| Year Built | 2004 |
| Manufacturer's Serial Number | 172S9679 |
| 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 | Individual |
| Owner Name | REGISTRATION PENDING |
| Street | 5749 S TRACY BLVD |
| City | TRACY |
| State | CA |
| Zip Code | 95377-8116 |
| Region | Western-Pacific |
| County | San Joaquin County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Standard |
| Airworthiness Date | 2004-08-20 |
| Last Action Date | 2022-12-29 |
| Status | Registration pending |
| Mode S Code | 51177712 |
| Mode S Code Hex | A4FFCA |