| Tail Number / N-Number | N644R |
| Type of Reservation | 2 year hold for canceled N-numbers |
| Reserving Party Name | CANCELLED/NOT ASSIGNED |
| Date Reserved | 2021-07-03 |
Deregistered Aircraft 1 of 2. This aircraft was previously assigned the N-number N644R.
| Tail Number / N-Number | N644R |
| Manufacturer | RAYNOVIC SAMUEL G |
| Model | CHALLENGER II |
| Year Built | 2005 |
| Manufacturer's Serial Number | CH2-0401-2070 |
| Aircraft Type | Fixed wing single engine |
| Category | Amphibian |
| Builder Certification | Not Type Certificated |
| Number of Seats | 2 seats |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Engine Manufacturer | ROTAX |
| Engine Model | SEE BOMBADIER |
| Engine Type | Reciprocating |
| Number of Engines | 1 engine |
| Kit Manufacturer | QUAD CITY ULTRALIGHT ACFT CORP |
| Kit Model | CHALLENGER II |
| Type of Registrant | Individual |
| Owner Name | WORKMAN MICHAEL C |
| Street | 4246 S EIDER CIR |
| City | WASILLA |
| State | AK |
| Zip Code | 99623-9863 |
| Country | US |
| Airworthiness Classification | Experimental |
| Airworthiness Date | 2005-05-02 |
| Certificate Issue Date | 2015-03-05 |
| Last Action Date | 2017-10-24 |
| Last Status | Registration Expired - Pending Cancellation |
| Cancellation Date | 2021-07-03 |
Deregistered Aircraft 2 of 2. This aircraft was previously assigned the N-number N644R.
| Tail Number / N-Number | N644R |
| Manufacturer | GRUMMAN |
| Model | G-21A |
| Manufacturer's Serial Number | B130 |
| 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 | Government |
| Owner Name | U S DEPARTMENT OF THE INTERIOR |
| Street | 4837 AIRCRAFT DR |
| City | ANCHORAGE |
| State | AK |
| Zip Code | 99502 |
| Country | US |
| Certificate Issue Date | 1976-03-23 |
| Last Action Date | 1998-05-20 |
| Last Status | The Triennial Aircraft Registration form was mailed and has not been returned by the Post Office |
| Cancellation Date | 1998-07-28 |