| Tail Number / N-Number | N991SF |
| Manufacturer | LOCKHEED |
| Model | TF-104G-M |
| Year Built | 1969 |
| Manufacturer's Serial Number | 54258 |
| Aircraft Type | Fixed wing single engine |
| Category | Land |
| Builder Certification | Not Type Certificated |
| Number of Seats | 1 seat |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Engine Manufacturer | GE |
| Engine Model | J79-11B |
| Engine Type | Turbo-jet |
| Number of Engines | 1 engine |
| Thrust | 15,600 pounds-force (69.4 kN) |
| Type of Registrant | Corporation |
| Owner Name | RLB AVIATION INC |
| Street | 1608 N JASMINE AVE |
| City | TARPON SPRINGS |
| State | FL |
| Zip Code | 34689-5250 |
| Region | Southern |
| County | Pinellas County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Experimental |
| Airworthiness Date | 2022-09-22 |
| Certificate Issue Date | 2013-03-07 |
| Last Action Date | 2021-11-14 |
| Expiration Date | 2029-03-31 |
| Status | Valid Registration |
| Mode S Code | 53353760 |
| Mode S Code Hex | ADD7F0 |
Deregistered Aircraft 1 of 1. This aircraft was previously assigned the N-number N991SF.
| Tail Number / N-Number | N991SF |
| Manufacturer | FARNHAM SHERWOOD ORRIN |
| Model | S-12 AIRAILE |
| Manufacturer's Serial Number | 0892268 |
| 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) |
| Number of Engines | 1 engine |
| Type of Registrant | Individual |
| Owner Name | FARNHAM SHERWOOD O |
| Street | 12237 BENNINGTON PL |
| City | MARYLAND HEIGHTS |
| State | MO |
| Zip Code | 63043 |
| County | Pinellas County |
| Country | US |
| Certificate Issue Date | 1993-04-26 |
| Last Action Date | 1999-04-20 |
| Last Status | The Triennial Aircraft Registration form was mailed and has not been returned by the Post Office |
| Cancellation Date | 2000-02-28 |