Deregistered Aircraft 1 of 1. This aircraft was previously assigned the N-number N4523P.
| Tail Number / N-Number | N4523P |
| Manufacturer | PIPER |
| Model | PA-23-250 |
| Year Built | 1960 |
| Manufacturer's Serial Number | 27-27 |
| Aircraft Type | Fixed wing multi engine |
| Category | Land |
| Builder Certification | Type Certificated |
| Number of Seats | 6 seats |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Engine Manufacturer | LYCOMING |
| Engine Model | 0-540 SERIES |
| Engine Type | Reciprocating |
| Number of Engines | 2 engines |
| Horsepower per Engine | 250 hp (187 kW) |
| Total Horsepower | 500 hp (373 kW) |
| Average Cruising Speed | 150 miles per hour |
| Type of Registrant | Corporation |
| Owner Name | DOERR AVIATION INC |
| Street | 1338 SOUTH TERMINAL DR |
| City | SAN ANTONIO |
| State | TX |
| Zip Code | 78216 |
| Country | US |
| Airworthiness Classification | Standard |
| Certificate Issue Date | 1975-12-09 |
| Last Action Date | 1977-03-26 |
| Last Status | Revoked – Canceled |
| Cancellation Date | 2012-07-19 |
| Mode S Code | 51276131 |
| Mode S Code Hex | A57C59 |