| Tail Number / N-Number | N121KM |
| Manufacturer | CESSNA |
| Model | 550 |
| Year Built | 1981 |
| Manufacturer's Serial Number | 550-0273 |
| Aircraft Type | Fixed wing multi engine |
| Category | Land |
| Builder Certification | Type Certificated |
| Number of Seats | 8 seats |
| Weight Class | CLASS 2 (12,500 - 19,999 pounds gross take off weight) |
| Engine Manufacturer | P&W CANADA |
| Engine Model | JT15D-4 |
| Engine Type | Turbo-fan |
| Number of Engines | 2 engines |
| Thrust per Engine | 2,500 pounds-force (11.1 kN) |
| Total Thrust | 5,000 pounds-force (22.2 kN) |
| Type of Registrant | LLC |
| Owner Name | TUPELO LTD LC |
| Street | 3098 CYPRESS LAKE DR |
| City | LAKE CHARLES |
| State | LA |
| Zip Code | 70611-3402 |
| Region | Southwestern |
| County | Calcasieu Parish |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Standard |
| Airworthiness Date | 1981-07-23 |
| Certificate Issue Date | 2021-02-25 |
| Last Action Date | 2021-02-25 |
| Expiration Date | 2028-02-29 |
| Status | Valid Registration |
| Mode S Code | 50054126 |
| Mode S Code Hex | A05856 |
Deregistered Aircraft 1 of 1. This aircraft was previously assigned the N-number N121KM.
| Tail Number / N-Number | N121KM |
| Manufacturer | PIPER |
| Model | PA-34-220T |
| Year Built | 1987 |
| Manufacturer's Serial Number | 34-33044 |
| Aircraft Type | Fixed wing multi engine |
| Category | Land |
| Builder Certification | Type Certificated |
| Number of Seats | 7 seats |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Engine Manufacturer | CONT MOTOR |
| Engine Model | TSIO-360 SER |
| Engine Type | Reciprocating |
| Number of Engines | 2 engines |
| Horsepower per Engine | 225 hp (168 kW) |
| Total Horsepower | 450 hp (336 kW) |
| Type of Registrant | Corporation |
| Owner Name | HI SIERRA HOMES INC |
| Street | 509 GUISANDO DE AVILA |
| City | TAMPA |
| State | FL |
| Zip Code | 33613-5233 |
| County | Calcasieu Parish |
| Country | US |
| Airworthiness Classification | Standard |
| Airworthiness Date | 1993-04-01 |
| Certificate Issue Date | 1998-06-23 |
| Last Action Date | 2004-01-06 |
| Last Status | Valid Registration |
| Cancellation Date | 2004-06-09 |
| Exported To | MEXICO |