| Tail Number / N-Number | N121E |
| Manufacturer | MOONEY |
| Model | M20E |
| Year Built | 1963 |
| Manufacturer's Serial Number | 173 |
| 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 | I0360 SER |
| Engine Type | Reciprocating |
| Number of Engines | 1 engine |
| Horsepower | 180 hp (134 kW) |
| Average Cruising Speed | 127 miles per hour |
| Type of Registrant | Individual |
| Owner Name | CONGER MARTIN D |
| Street | 160 MCDONALD DR |
| City | PASCO |
| State | WA |
| Zip Code | 99301 |
| Region | Northwest Mountain |
| County | Franklin County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Standard |
| Airworthiness Date | 1963-11-04 |
| Certificate Issue Date | 1994-08-29 |
| Last Action Date | 2020-08-20 |
| Expiration Date | 2028-01-31 |
| Status | Valid Registration |
| Mode S Code | 50053715 |
| Mode S Code Hex | A057CD |
Deregistered Aircraft 1 of 1. This aircraft was previously assigned the N-number N121E.
| Tail Number / N-Number | N121E |
| Manufacturer | BEECH |
| Model | 65-B80 |
| Manufacturer's Serial Number | LD387 |
| Aircraft Type | Fixed wing multi engine |
| Category | Land |
| Builder Certification | Type Certificated |
| Number of Seats | 9 seats |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Number of Engines | 2 engines |
| Average Cruising Speed | 174 miles per hour |
| County | Franklin County |
| Last Status | N-Number Assigned – but has not yet been registered |
| Cancellation Date | 1989-03-20 |