| Tail Number / N-Number | N128SF |
| Manufacturer | BEECH |
| Model | 99 |
| Year Built | 1969 |
| Manufacturer's Serial Number | U-87 |
| Aircraft Type | Fixed wing multi engine |
| Category | Land |
| Builder Certification | Type Certificated |
| Number of Seats | 17 seats |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Engine Manufacturer | P&W |
| Engine Model | PT6A SER |
| Engine Type | Turbo-prop |
| Number of Engines | 2 engines |
| Horsepower per Engine | 750 hp (560 kW) |
| Total Horsepower | 1,500 hp (1,119 kW) |
| Average Cruising Speed | 187 miles per hour |
| Type of Registrant | Corporation |
| Owner Name | AY AY HOLDINGS INC |
| Street | PO BOX 1045 |
| City | ST CROIX |
| State | VI |
| Zip Code | 00851 |
| Region | Southern |
| Country | VI |
| Fractional Ownership | No |
| Airworthiness Classification | Standard |
| Airworthiness Date | 1996-06-28 |
| Certificate Issue Date | 2014-05-22 |
| Last Action Date | 2023-01-22 |
| Expiration Date | 2027-05-31 |
| Status | Valid Registration |
| Mode S Code | 50071400 |
| Mode S Code Hex | A07300 |