Deregistered Aircraft 1 of 1. This aircraft was previously assigned the N-number N178LS.
| Tail Number / N-Number | N178LS |
| Manufacturer | SULLIVAN LARRY |
| Model | SULLIVAN 503 |
| Year Built | 1985 |
| Manufacturer's Serial Number | 178 |
| Aircraft Type | Fixed wing single engine |
| Category | Land |
| Builder Certification | Not Type Certificated |
| Number of Seats | 2 seats |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Engine Manufacturer | ROTAX |
| Engine Model | SEE BOMBADIER |
| Engine Type | Reciprocating |
| Number of Engines | 1 engine |
| Type of Registrant | Individual |
| Owner Name | SULLIVAN LARRY M |
| Street | 32 WATER ST |
| City | GLEN ROCK |
| State | PA |
| Zip Code | 17327 |
| Country | US |
| Airworthiness Classification | Experimental |
| Airworthiness Date | 1985-03-08 |
| Certificate Issue Date | 1985-01-28 |
| Last Action Date | 1991-03-30 |
| Last Status | Registration Expired – Pending Cancellation |
| Cancellation Date | 2014-12-17 |
| Mode S Code | 50233760 |
| Mode S Code Hex | A137F0 |