| Tail Number / N-Number | N4221A |
| Manufacturer | RATTE JAMES |
| Model | CHALLENGER II |
| Year Built | 1991 |
| Manufacturer's Serial Number | CH201910612 |
| Aircraft Type | Fixed wing single engine |
| Category | Land |
| Builder Certification | Not Type Certificated |
| Number of Seats | 1 seat |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Engine Manufacturer | AMA/EXPR |
| Engine Model | UNKNOWN ENG |
| Number of Engines | 1 engine |
| Type of Registrant | Individual |
| Owner Name | KRETSCHMAN JAMES G |
| Street | 2677 EBENEZER RD |
| City | FENNIMORE |
| State | WI |
| Zip Code | 53809-9720 |
| Region | Great Lakes |
| County | Grant County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Experimental |
| Airworthiness Date | 1991-11-18 |
| Certificate Issue Date | 1998-07-15 |
| Last Action Date | 2020-07-27 |
| Expiration Date | 2027-12-31 |
| Status | Valid Registration |
| Mode S Code | 51202611 |
| Mode S Code Hex | A50589 |
Deregistered Aircraft 1 of 2. This aircraft was previously assigned the N-number N4221A.
| Tail Number / N-Number | N4221A |
| Manufacturer | GRUMMAN |
| Model | G-21A |
| Manufacturer's Serial Number | 1030 |
| Aircraft Type | Fixed wing multi engine |
| Category | Amphibian |
| 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 |
| Average Cruising Speed | 150 miles per hour |
| Type of Registrant | Corporation |
| Owner Name | CATALINA CHANNEL AIRLINES INC |
| Street | LONG BEACH MUNICIPAL AIRPORT |
| City | LONG BEACH |
| State | CA |
| Zip Code | 90001 |
| Region | Western-Pacific |
| County | Grant County |
| Certificate Issue Date | 1961-01-16 |
| Last Status | Valid Registration |
| Cancellation Date | 1964-09-16 |
Deregistered Aircraft 2 of 2. This aircraft was previously assigned the N-number N4221A.
| Tail Number / N-Number | N4221A |
| Manufacturer | CESSNA |
| Model | 310R |
| Manufacturer's Serial Number | 310R1378 |
| Aircraft Type | Fixed wing multi engine |
| Category | Land |
| Builder Certification | Type Certificated |
| Number of Seats | 6 seats |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Number of Engines | 2 engines |
| County | Grant County |
| Last Status | N-Number Assigned – but has not yet been registered |