| Tail Number / N-Number | N554SG |
| Manufacturer | GALLAGHER DAVID M |
| Model | ZODIAC 601XL |
| Manufacturer's Serial Number | 6-6588 |
| 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 | JABIRU |
| Engine Model | 3300 |
| Engine Type | 4 Cycle |
| Number of Engines | 1 engine |
| Horsepower | 120 hp (90 kW) |
| Kit Manufacturer | ZENITH AIRCRAFT CO |
| Kit Model | ZODIAC 601 XL |
| Type of Registrant | Individual |
| Owner Name | GALLAGHER DAVID M |
| Street | 8863 MORROW ROSSBURG RD |
| City | PLEASANT PLAIN |
| State | OH |
| Zip Code | 45162-9710 |
| Region | Great Lakes |
| County | Warren County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Experimental |
| Airworthiness Date | 2008-07-16 |
| Certificate Issue Date | 2008-05-08 |
| Last Action Date | 2022-11-18 |
| Expiration Date | 2030-04-30 |
| Status | Valid Registration |
| Mode S Code | 51607736 |
| Mode S Code Hex | A70FDE |