| Tail Number / N-Number | N991AP |
| Manufacturer | RICK SAYLES |
| Model | SLING 4/TSI |
| Year Built | 2021 |
| Manufacturer's Serial Number | 234SK |
| Aircraft Type | Fixed wing single engine |
| Category | Land |
| Builder Certification | Not Type Certificated |
| Number of Seats | 4 seats |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Engine Manufacturer | ROTAX |
| Engine Model | 915 IS |
| Engine Type | 4 Cycle |
| Number of Engines | 1 engine |
| Horsepower | 135 hp (101 kW) |
| Kit Manufacturer | AIRPLANE FACTORY |
| Kit Model | SLING 4 TSI |
| Type of Registrant | Corporation |
| Owner Name | OCCOM PROPERTIES INC |
| Street | 159 MAIN ST STE 100 |
| City | NASHUA |
| State | NH |
| Zip Code | 03060-2725 |
| Region | New England |
| County | Hillsborough County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Experimental |
| Airworthiness Date | 2022-01-12 |
| Certificate Issue Date | 2021-09-29 |
| Last Action Date | 2021-09-29 |
| Expiration Date | 2028-09-30 |
| Status | Valid Registration |
| Mode S Code | 53353150 |
| Mode S Code Hex | ADD668 |