| Tail Number / N-Number | N204EM |
| Manufacturer | ELLISON-MAHON AIRCRAFT INC |
| Model | GWEDUCK |
| Manufacturer's Serial Number | 1 |
| Aircraft Type | Fixed wing multi engine |
| Category | Amphibian |
| Builder Certification | Not Type Certificated |
| Number of Seats | 7 seats |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Number of Engines | 2 engines |
| Kit Manufacturer | ELLISON-MAHON AIRCRAFT INC |
| Kit Model | GWEDUCK |
| Type of Registrant | Corporation |
| Owner Name | ELLISON-MAHON AIRCRAFT INC |
| Street | 9406 SE SHORELAND DR |
| City | BELLEVUE |
| State | WA |
| Zip Code | 98004-6515 |
| Region | Northwest Mountain |
| County | King County |
| Country | US |
| Fractional Ownership | No |
| Certificate Issue Date | 2006-05-12 |
| Last Action Date | 2020-06-10 |
| Expiration Date | 2027-09-30 |
| Status | Valid Registration |
| Mode S Code | 50320517 |
| Mode S Code Hex | A1A14F |