| Tail Number / N-Number | N8121J |
| Manufacturer | PIPER |
| Model | PA-28-181 |
| Year Built | 1979 |
| Manufacturer's Serial Number | 28-8090141 |
| 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 | O&VO-360 SER |
| Engine Type | Reciprocating |
| Number of Engines | 1 engine |
| Horsepower | 180 hp (134 kW) |
| Average Cruising Speed | 105 miles per hour |
| Type of Registrant | Individual |
| Owner Name | WIELAND JOAN G TRUSTEE |
| Street | 24 RED FOX DR |
| City | SHERIDAN |
| State | WY |
| Zip Code | 82801-8637 |
| Region | Northwest Mountain |
| County | Sheridan County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Standard |
| Airworthiness Date | 1979-10-10 |
| Certificate Issue Date | 2007-04-04 |
| Last Action Date | 2022-08-24 |
| Expiration Date | 2030-01-31 |
| Status | Valid Registration |
| Mode S Code | 52611516 |
| Mode S Code Hex | AB134E |
Deregistered Aircraft 1 of 1. This aircraft was previously assigned the N-number N8121J.
| Tail Number / N-Number | N8121J |
| Manufacturer | BELL |
| Model | 205A-1 |
| Manufacturer's Serial Number | 30087 |
| Aircraft Type | Rotorcraft |
| Category | Land |
| Builder Certification | Type Certificated |
| Number of Seats | 15 seats |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Number of Engines | 1 engine |
| Average Cruising Speed | 103 miles per hour |
| Type of Registrant | Corporation |
| Owner Name | COSMODYNE CORP |
| Street | 2920 COLUMBIA ST |
| City | TORRANCE |
| State | CA |
| Zip Code | 90509 |
| Region | Western-Pacific |
| County | Sheridan County |
| Certificate Issue Date | 1970-06-30 |
| Last Status | Valid Registration |
| Cancellation Date | 1970-07-09 |
| Exported To | INDONESIA |