| Tail Number / N-Number | N15Y |
| Manufacturer | GULFSTREAM AEROSPACE |
| Model | G-IV |
| Year Built | 1997 |
| Manufacturer's Serial Number | 1318 |
| Aircraft Type | Fixed wing multi engine |
| Category | Land |
| Builder Certification | Type Certificated |
| Number of Seats | 22 seats |
| Weight Class | CLASS 3 (20,000+ pounds gross take off weight) |
| Engine Manufacturer | ROLLS-ROYC |
| Engine Model | TAY 611SER |
| Engine Type | Turbo-fan |
| Number of Engines | 2 engines |
| Thrust per Engine | 12,450 pounds-force (55.4 kN) |
| Total Thrust | 24,900 pounds-force (110.8 kN) |
| Type of Registrant | LLC |
| Owner Name | G4SP LLC |
| Street | 18101 VON KARMAN AVE |
| City | IRVINE |
| State | CA |
| Zip Code | 92612-1012 |
| Region | Western-Pacific |
| County | Orange County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Standard |
| Airworthiness Date | 1997-09-08 |
| Certificate Issue Date | 2009-03-20 |
| Last Action Date | 2022-11-28 |
| Expiration Date | 2029-11-30 |
| Status | Valid Registration |
| Mode S Code | 50144774 |
| Mode S Code Hex | A0C9FC |
Deregistered Aircraft 1 of 2. This aircraft was previously assigned the N-number N15Y.
| Tail Number / N-Number | N15Y |
| Manufacturer | KEMPER |
| Model | NAZGUL |
| Manufacturer's Serial Number | 1 |
| Aircraft Type | Fixed wing single engine |
| Category | Amphibian |
| Builder Certification | Not Type Certificated |
| Number of Seats | 1 seat |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Number of Engines | 1 engine |
| Average Cruising Speed | 85 miles per hour |
| County | Orange County |
| Last Status | Administratively canceled |
Deregistered Aircraft 2 of 2. This aircraft was previously assigned the N-number N15Y.
| Tail Number / N-Number | N15Y |
| Manufacturer | FREDERIKSEN |
| Model | FREDERIKSEN 1 |
| Manufacturer's Serial Number | HFPT-3 |
| 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) |
| Number of Engines | 1 engine |
| Type of Registrant | Individual |
| Owner Name | FREDERIKSEN HERBERT |
| Street | BOX 46 |
| City | BLUFF POINT |
| State | NY |
| Zip Code | 10001 |
| Region | Eastern |
| County | Orange County |
| Last Status | Valid Registration |
| Cancellation Date | 1935-09-15 |