| Tail Number / N-Number | N991DF |
| Manufacturer | COLUMBIA AIRCRAFT MFG |
| Model | LC41-550FG |
| Year Built | 2006 |
| Manufacturer's Serial Number | 41626 |
| 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 | CONT MOTOR |
| Engine Model | TSIO-550-C |
| Engine Type | Reciprocating |
| Number of Engines | 1 engine |
| Horsepower | 310 hp (231 kW) |
| Type of Registrant | Individual |
| Owner Name | KNOWLES LUKE A |
| Street | 8342 GOLDEN EAGLE RD |
| City | FORT COLLINS |
| State | CO |
| Zip Code | 80528-9345 |
| Region | Northwest Mountain |
| County | Larimer County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Standard |
| Airworthiness Date | 2006-06-02 |
| Certificate Issue Date | 2017-10-30 |
| Last Action Date | 2020-05-12 |
| Expiration Date | 2027-10-31 |
| Status | Valid Registration |
| Mode S Code | 53353253 |
| Mode S Code Hex | ADD6AB |