| Tail Number / N-Number | N121L |
| Manufacturer | SPORT PLANE DYNAMICS LLC |
| Model | LIGHTNING |
| Year Built | 2010 |
| Manufacturer's Serial Number | 45 |
| Aircraft Type | Fixed wing single engine |
| Category | Land |
| Builder Certification | Not Type Certificated |
| Number of Seats | 2 seats |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Engine Manufacturer | JABIRU |
| Engine Model | 3300 |
| Engine Type | 4 Cycle |
| Number of Engines | 1 engine |
| Horsepower | 120 hp (90 kW) |
| Kit Manufacturer | ARION AIRCRAFT LLC |
| Kit Model | LIGHTNING |
| Type of Registrant | Individual |
| Owner Name | WOOD MAURICE E |
| Street | 175 HUTTON RANCH RD STE 103 |
| City | KALISPELL |
| State | MT |
| Zip Code | 59901-2142 |
| Region | Northwest Mountain |
| County | Flathead County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Experimental |
| Airworthiness Date | 2010-07-26 |
| Certificate Issue Date | 2014-10-28 |
| Last Action Date | 2020-08-12 |
| Expiration Date | 2027-10-31 |
| Status | Valid Registration |
| Mode S Code | 50054143 |
| Mode S Code Hex | A05863 |
Deregistered Aircraft 1 of 2. This aircraft was previously assigned the N-number N121L.
| Tail Number / N-Number | N121L |
| Manufacturer | PIPER |
| Model | PA-31 |
| Manufacturer's Serial Number | 317512005 |
| 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 |
| Type of Registrant | Corporation |
| Owner Name | MISSISSIPPI EXECUTIVE AIRCRAFT CO |
| Street | 5901 SUN BLVD # 106A |
| City | ST PETERSBURG |
| State | FL |
| Zip Code | 33715 |
| County | Flathead County |
| Country | US |
| Certificate Issue Date | 1994-06-02 |
| Last Action Date | 1994-06-06 |
| Last Status | Valid Registration |
| Cancellation Date | 1994-09-02 |
| Exported To | CANADA |
Deregistered Aircraft 2 of 2. This aircraft was previously assigned the N-number N121L.
| Tail Number / N-Number | N121L |
| Manufacturer | CESSNA |
| Model | 172G |
| Manufacturer's Serial Number | 17254798 |
| 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 | CROWE JOHN H |
| Street | 2373 DATE PALM RD |
| City | BOCA RATON |
| State | FL |
| Zip Code | 33432 |
| County | Flathead County |
| Country | US |
| Certificate Issue Date | 1987-06-11 |
| Last Action Date | 1991-12-04 |
| Last Status | The Triennial Aircraft Registration form was mailed and has not been returned by the Post Office |
| Cancellation Date | 1992-03-05 |