| Tail Number / N-Number | N28991 |
| Manufacturer | GULFSTREAM AMERICAN CORP |
| Model | AA-5B |
| Year Built | 1978 |
| Manufacturer's Serial Number | AA5B0926 |
| 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 | LYCOMING |
| Engine Model | O&VO-360 SER |
| Engine Type | Reciprocating |
| Number of Engines | 1 engine |
| Horsepower | 180 hp (134 kW) |
| Type of Registrant | Individual |
| Owner Name | GREENBERG WILLIAM J |
| Street | 30 SOUTHWICK RD |
| City | SUTTON |
| State | MA |
| Zip Code | 01590-2301 |
| Region | New England |
| County | Worcester County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Standard |
| Airworthiness Date | 1978-09-25 |
| Certificate Issue Date | 2005-05-19 |
| Last Action Date | 2023-01-22 |
| Expiration Date | 2027-05-31 |
| Status | Valid Registration |
| Mode S Code | 50571427 |
| Mode S Code Hex | A2F317 |