| Tail Number / N-Number | N2121K |
| Manufacturer | MOONEY |
| Model | M20M |
| Year Built | 1997 |
| Manufacturer's Serial Number | 27-0229 |
| 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 | TI0-540 SER |
| Engine Type | Turbo-prop |
| Number of Engines | 1 engine |
| Horsepower | 310 hp (231 kW) |
| Type of Registrant | Corporation |
| Owner Name | FOSS INVESTMENT CO INC |
| Street | 2675 ARDON LN |
| City | CASPER |
| State | WY |
| Zip Code | 82609-3902 |
| Region | Northwest Mountain |
| County | Natrona County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Standard |
| Airworthiness Date | 1997-02-10 |
| Certificate Issue Date | 2010-04-23 |
| Last Action Date | 2023-01-04 |
| Expiration Date | 2030-01-31 |
| Status | Valid Registration |
| Mode S Code | 50341565 |
| Mode S Code Hex | A1C375 |
Deregistered Aircraft 1 of 2. This aircraft was previously assigned the N-number N2121K.
| Tail Number / N-Number | N2121K |
| Manufacturer | PIPER |
| Model | PA-28-181 |
| Manufacturer's Serial Number | 287990236 |
| 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) |
| Number of Engines | 1 engine |
| Average Cruising Speed | 105 miles per hour |
| Type of Registrant | Individual |
| Owner Name | SALES REPORTED |
| Other Names |
|
| Street | UNKNOWN |
| City | XXX |
| State | OK |
| Zip Code | 73125 |
| County | Natrona County |
| Country | US |
| Certificate Issue Date | 1993-03-25 |
| Last Action Date | 1993-03-25 |
| Last Status | Valid Registration |
| Cancellation Date | 1993-04-02 |
| Exported To | GERMANY |
Deregistered Aircraft 2 of 2. This aircraft was previously assigned the N-number N2121K.
| Tail Number / N-Number | N2121K |
| Manufacturer | LUSCOMBE |
| Model | 8A |
| Manufacturer's Serial Number | 4848 |
| 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) |
| Number of Engines | 1 engine |
| Average Cruising Speed | 86 miles per hour |
| Type of Registrant | Corporation |
| Owner Name | K&S FLIERS INC |
| Street | 141 BROADWAY |
| City | MALVERNE |
| State | NY |
| Zip Code | 11565 |
| Region | Eastern |
| County | Natrona County |
| Certificate Issue Date | 1951-07-12 |
| Last Status | Valid Registration |
| Cancellation Date | 1953-01-05 |