| Tail Number / N-Number | N51735 |
| Manufacturer | ENSTROM HELICOPTER CORP |
| Model | 280C |
| Year Built | 1978 |
| Manufacturer's Serial Number | 1139 |
| Aircraft Type | Rotorcraft |
| Category | Land |
| Builder Certification | Type Certificated |
| Number of Seats | 3 seats |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Engine Manufacturer | LYCOMING |
| Engine Model | HI0-360 SER |
| Engine Type | Turbo-shaft |
| Number of Engines | 1 engine |
| Horsepower | 205 hp (153 kW) |
| Type of Registrant | LLC |
| Owner Name | PROTAC AVIATION LLC |
| Street | 12413 MESA VISTA PL |
| City | SAN DIEGO |
| State | CA |
| Zip Code | 92131-2681 |
| Region | Western-Pacific |
| County | San Diego County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Standard |
| Certificate Issue Date | 2021-01-22 |
| Last Action Date | 2021-01-22 |
| Expiration Date | 2028-01-31 |
| Status | Valid Registration |
| Mode S Code | 51477117 |
| Mode S Code Hex | A67E4F |
Deregistered Aircraft 1 of 1. This aircraft was previously assigned the N-number N51735.
| Tail Number / N-Number | N51735 |
| Manufacturer | CESSNA |
| Model | T-50 |
| Manufacturer's Serial Number | 3817 |
| Aircraft Type | Fixed wing multi engine |
| Category | Land |
| Builder Certification | Type Certificated |
| Number of Seats | 5 seats |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Number of Engines | 2 engines |
| Average Cruising Speed | 131 miles per hour |
| Type of Registrant | Individual |
| Owner Name | LOWY H BERNARD |
| Street | 60 PARK PLACE |
| City | NEWARK 2 |
| State | NJ |
| Zip Code | 07101 |
| Region | Eastern |
| County | San Diego County |
| Certificate Issue Date | 1947-01-06 |
| Last Status | Valid Registration |
| Cancellation Date | 1950-03-08 |