| Tail Number / N-Number | N5504A |
| Manufacturer | QUICKSILVER ENTERPRISES INC |
| Model | SPORT MXL II |
| Year Built | 1992 |
| Manufacturer's Serial Number | 4311 |
| Aircraft Type | Fixed wing single engine |
| Category | Land |
| Builder Certification | Light Sport |
| Number of Seats | 2 seats |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Engine Manufacturer | ROTAX |
| Engine Model | 582DCDI |
| Engine Type | 2 Cycle |
| Number of Engines | 1 engine |
| Horsepower | 65 hp (48 kW) |
| Type of Registrant | LLC |
| Owner Name | YOUNGWERTH AIRPLANES LLC |
| Street | 12000 W FRANKLIN RD |
| City | BOISE |
| State | ID |
| Zip Code | 83714 |
| Region | Northwest Mountain |
| County | Ada County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Experimental |
| Airworthiness Date | 2007-11-06 |
| Certificate Issue Date | 2021-05-11 |
| Last Action Date | 2021-05-11 |
| Expiration Date | 2028-05-31 |
| Status | Valid Registration |
| Mode S Code | 51601120 |
| Mode S Code Hex | A70250 |
Deregistered Aircraft 1 of 1. This aircraft was previously assigned the N-number N5504A.
| Tail Number / N-Number | N5504A |
| Manufacturer | MOONEY |
| Model | M20A |
| Manufacturer's Serial Number | 1427 |
| Aircraft Type | Fixed wing single engine |
| Category | Land |
| Builder Certification | Type Certificated |
| Number of Seats | 4 seats |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Number of Engines | 1 engine |
| Average Cruising Speed | 127 miles per hour |
| Type of Registrant | Individual |
| Owner Name | NEIFFER HIRAM M |
| Street | 11 GERRANS AVE |
| City | GILLETTE |
| State | WY |
| Zip Code | 82716 |
| County | Ada County |
| Country | US |
| Certificate Issue Date | 1988-01-11 |
| Last Action Date | 1992-07-01 |
| Last Status | The Triennial Aircraft Registration form was mailed and has not been returned by the Post Office |
| Cancellation Date | 1993-01-11 |