| Tail Number / N-Number | N99421 |
| Manufacturer | FORNEY |
| Model | 415-C |
| Year Built | 1946 |
| Manufacturer's Serial Number | 2044 |
| 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) |
| Engine Manufacturer | CONT MOTOR |
| Engine Model | C85 SERIES |
| Engine Type | Reciprocating |
| Number of Engines | 1 engine |
| Horsepower | 85 hp (63 kW) |
| Average Cruising Speed | 900 miles per hour |
| Type of Registrant | Individual |
| Owner Name | FERGUSON JEANETTE S |
| Street | 4 AIRPORT DR # 15 |
| City | TOWNSEND |
| State | MT |
| Zip Code | 59644 |
| Region | Northwest Mountain |
| County | Broadwater County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Standard |
| Airworthiness Date | 1957-11-05 |
| Certificate Issue Date | 2006-03-01 |
| Last Action Date | 2019-08-26 |
| Expiration Date | 2022-10-31 |
| Status | Registration Expired - Pending Cancellation |
| Mode S Code | 53362067 |
| Mode S Code Hex | ADE437 |