Deregistered Aircraft 1 of 1. This aircraft was previously assigned the N-number N503Z.
| Tail Number / N-Number | N503Z |
| Manufacturer | BEECH |
| Model | D18S |
| Year Built | 1951 |
| Manufacturer's Serial Number | A-552 |
| Aircraft Type | Fixed wing multi engine |
| Category | Land |
| Builder Certification | Type Certificated |
| Number of Seats | 10 seats |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Engine Manufacturer | P&W |
| Engine Model | R-985 SERIES |
| Engine Type | Reciprocating |
| Number of Engines | 2 engines |
| Horsepower per Engine | 450 hp (336 kW) |
| Total Horsepower | 900 hp (671 kW) |
| Average Cruising Speed | 165 miles per hour |
| Type of Registrant | Corporation |
| Owner Name | WEST PORT CAPITAL CORP |
| Street | 940 WEST PORT PLAZA SUITE 212 |
| City | ST LOUIS |
| State | MO |
| Zip Code | 63043 |
| Country | US |
| Airworthiness Classification | Standard |
| Airworthiness Date | 1955-12-29 |
| Certificate Issue Date | 1980-08-04 |
| Last Action Date | 1983-06-15 |
| Last Status | Registration Expired – Pending Cancellation |
| Cancellation Date | 2013-03-19 |
| Mode S Code | 51443524 |
| Mode S Code Hex | A64754 |