| Tail Number / N-Number | N4521N |
| Manufacturer | GULFSTREAM AMERICAN CORP |
| Model | AA-5B |
| Year Built | 1979 |
| Manufacturer's Serial Number | AA5B1073 |
| 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 | MEHRABAN SEYED HABIB |
| Street | 10760 ROSE AVE # 300 |
| City | LOS ANGELES |
| State | CA |
| Zip Code | 90034-4439 |
| Region | Western-Pacific |
| County | Los Angeles County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Standard |
| Airworthiness Date | 1979-01-23 |
| Certificate Issue Date | 2014-12-11 |
| Last Action Date | 2020-11-16 |
| Expiration Date | 2027-12-31 |
| Status | Valid Registration |
| Mode S Code | 51276022 |
| Mode S Code Hex | A57C12 |
Deregistered Aircraft 1 of 1. This aircraft was previously assigned the N-number N4521N.
| Tail Number / N-Number | N4521N |
| Manufacturer | CONSOLIDATED VULTEE |
| Model | BT-13A |
| Manufacturer's Serial Number | 6928 |
| Aircraft Type | Fixed wing single engine |
| Category | Land |
| Builder Certification | 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 |
| Average Cruising Speed | 108 miles per hour |
| Type of Registrant | Individual |
| Owner Name | KAVANAUGH JACK M |
| Street | 14 3RD AVE VILLAS |
| City | TEXAS CITY |
| State | TX |
| Zip Code | 77590 |
| Region | Southwestern |
| County | Los Angeles County |
| Certificate Issue Date | 1949-07-15 |
| Last Status | Valid Registration |
| Cancellation Date | 1949-08-30 |