| Tail Number / N-Number | N3521C |
| Manufacturer | BUCCANEER AIRCRAFT |
| Model | BUCCANEER SX |
| Year Built | 2000 |
| Manufacturer's Serial Number | 258DE |
| Aircraft Type | Fixed wing single engine |
| Category | Amphibian |
| Builder Certification | Light Sport |
| Number of Seats | 1 seat |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Engine Manufacturer | ROTAX |
| Engine Model | 503 SERIES |
| Engine Type | 2 Cycle |
| Number of Engines | 1 engine |
| Horsepower | 52 hp (39 kW) |
| Type of Registrant | Individual |
| Owner Name | MOHR JOHN R |
| Street | 625 W HANGAR RD HGR 12-8 |
| City | NEW RICHMOND |
| State | WI |
| Zip Code | 54017 |
| Region | Great Lakes |
| County | St. Croix County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Experimental |
| Airworthiness Date | 2007-11-13 |
| Certificate Issue Date | 2007-09-20 |
| Last Action Date | 2021-03-29 |
| Expiration Date | 2028-05-31 |
| Status | Valid Registration |
| Mode S Code | 50767271 |
| Mode S Code Hex | A3EEB9 |
Deregistered Aircraft 1 of 2. This aircraft was previously assigned the N-number N3521C.
| Tail Number / N-Number | N3521C |
| Manufacturer | PIPER |
| Model | PA-31 |
| Year Built | 1979 |
| Manufacturer's Serial Number | 31-7912069 |
| Aircraft Type | Fixed wing multi engine |
| Category | Land |
| Builder Certification | Type Certificated |
| Number of Seats | 8 seats |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Number of Engines | 2 engines |
| Type of Registrant | Corporation |
| Owner Name | GLOBE AERO LTD INC |
| Street | PO BOX 5775 |
| City | LAKELAND |
| State | FL |
| Zip Code | 33803 |
| Region | Southern |
| County | St. Croix County |
| Certificate Issue Date | 1979-07-11 |
| Last Status | Valid Registration |
| Cancellation Date | 1979-07-12 |
| Exported To | BELGIUM |
Deregistered Aircraft 2 of 2. This aircraft was previously assigned the N-number N3521C.
| Tail Number / N-Number | N3521C |
| Manufacturer | CESSNA |
| Model | 170B |
| Manufacturer's Serial Number | 26564 |
| 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 | 105 miles per hour |
| Type of Registrant | Individual |
| Owner Name | HIEBERT GORDON E |
| Street | P O BOX 93 |
| City | HERLONG |
| State | CA |
| Zip Code | 90001 |
| Region | Western-Pacific |
| County | St. Croix County |
| Certificate Issue Date | 1960-08-31 |
| Last Status | Valid Registration |
| Cancellation Date | 1965-05-20 |