| Tail Number / N-Number | N4421U |
| Manufacturer | CESSNA |
| Model | 182Q |
| Year Built | 1980 |
| Manufacturer's Serial Number | 18267449 |
| 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) |
| Engine Manufacturer | CONT MOTOR |
| Engine Model | O-470 SERIES |
| Engine Type | Reciprocating |
| Number of Engines | 1 engine |
| Horsepower | 230 hp (172 kW) |
| Average Cruising Speed | 112 miles per hour |
| Type of Registrant | Individual |
| Owner Name | CLAYPOOL JAMES W |
| Street | 3837 HUNTS POINT RD |
| City | HUNTS POINT |
| State | WA |
| Zip Code | 98004-1111 |
| Region | Northwest Mountain |
| County | King County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Standard |
| Airworthiness Date | 1992-10-09 |
| Certificate Issue Date | 1992-12-03 |
| Last Action Date | 2021-08-12 |
| Expiration Date | 2029-01-31 |
| Status | Valid Registration |
| Mode S Code | 51252231 |
| Mode S Code Hex | A55499 |
Deregistered Aircraft 1 of 2. This aircraft was previously assigned the N-number N4421U.
| Tail Number / N-Number | N4421U |
| Manufacturer | CESSNA |
| Model | 150D |
| Manufacturer's Serial Number | 15060421 |
| Aircraft Type | Fixed wing single engine |
| Category | Land |
| Builder Certification | Type Certificated |
| Number of Seats | 2 seats |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Number of Engines | 1 engine |
| Average Cruising Speed | 90 miles per hour |
| Type of Registrant | Corporation |
| Owner Name | CESSNA AIRCRAFT COMPANY |
| Street | 5800 PAWNEE ROAD |
| City | WICHITA |
| State | KS |
| Zip Code | 67207 |
| Region | Central |
| County | King County |
| Last Status | Valid Registration |
| Cancellation Date | 1964-04-02 |
| Exported To | CANADA |
Deregistered Aircraft 2 of 2. This aircraft was previously assigned the N-number N4421U.
| Tail Number / N-Number | N4421U |
| Manufacturer | COLUMBIA/ULTLTE SPORT AVN INC |
| Model | WIZARD J-3 |
| Manufacturer's Serial Number | AW12 |
| 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) |
| Number of Engines | 1 engine |
| County | King County |
| Last Status | The Triennial Aircraft Registration form was mailed and has not been returned by the Post Office |