Deregistered Aircraft 1 of 1. This aircraft was previously assigned the N-number N503SW.
| Tail Number / N-Number | N503SW |
| Manufacturer | BOEING |
| Model | 737-5H4 |
| Year Built | 1990 |
| Manufacturer's Serial Number | 24180 |
| Aircraft Type | Fixed wing multi engine |
| Category | Land |
| Builder Certification | Type Certificated |
| Number of Seats | 149 seats |
| Weight Class | CLASS 3 (20,000+ pounds gross take off weight) |
| Engine Manufacturer | CFM INTL. |
| Engine Model | CFM56 SERIES |
| Engine Type | Turbo-fan |
| Number of Engines | 2 engines |
| Horsepower per Engine | 2,200 hp (1,641 kW) |
| Total Horsepower | 4,400 hp (3,282 kW) |
| Type of Registrant | Corporation |
| Owner Name | SOUTHWEST AIRLINES CO |
| Street | 2702 LOVE FIELD DR # HDQ-4GC |
| City | DALLAS |
| State | TX |
| Zip Code | 75235-1908 |
| Country | US |
| Airworthiness Classification | Standard |
| Airworthiness Date | 1990-02-28 |
| Certificate Issue Date | 2000-03-30 |
| Last Action Date | 2010-12-07 |
| Last Status | Valid Registration |
| Cancellation Date | 2012-07-16 |
| Mode S Code | 51443272 |
| Mode S Code Hex | A646BA |