| Tail Number / N-Number | N4251N |
| Manufacturer | TRAVEL AIR |
| Model | 4000 |
| Manufacturer's Serial Number | 808 |
| Aircraft Type | Fixed wing single engine |
| Category | Land |
| Builder Certification | Type Certificated |
| Number of Seats | 3 seats |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Number of Engines | 1 engine |
| Average Cruising Speed | 79 miles per hour |
| Type of Registrant | Individual |
| Owner Name | ZEILER RICHARD H |
| Street | 12 SANTA TERESA |
| City | RCHO STA MARG |
| State | CA |
| Zip Code | 92688-2546 |
| Region | Western-Pacific |
| County | Orange County |
| Country | US |
| Fractional Ownership | No |
| Certificate Issue Date | 1992-03-20 |
| Last Action Date | 2022-08-22 |
| Expiration Date | 2030-01-31 |
| Status | Valid Registration |
| Mode S Code | 51210272 |
| Mode S Code Hex | A510BA |
Deregistered Aircraft 1 of 1. This aircraft was previously assigned the N-number N4251N.
| Tail Number / N-Number | N4251N |
| Manufacturer | CESSNA |
| Model | 140 |
| Manufacturer's Serial Number | 13722 |
| 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 | 105 miles per hour |
| County | Orange County |
| Last Status | N-Number Assigned – but has not yet been registered |
| Cancellation Date | 1989-02-21 |