| Tail Number / N-Number | N308D |
| Type of Reservation | 2 year hold for canceled N-numbers |
| Reserving Party Name | CANCELLED/NOT ASSIGNED |
| Date Reserved | 2021-10-02 |
Deregistered Aircraft 1 of 2. This aircraft was previously assigned the N-number N308D.
| Tail Number / N-Number | N308D |
| Manufacturer | DUNN DAVID W |
| Model | DDUNN-VORTEX |
| Manufacturer's Serial Number | DD-102010 |
| Aircraft Type | Rotorcraft |
| 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 |
| Type of Registrant | Individual |
| Owner Name | DUNN DAVID W |
| Street | PO BOX 24 |
| City | NEWCASTLE |
| State | WY |
| Zip Code | 82701-0024 |
| Country | US |
| Certificate Issue Date | 2010-09-14 |
| Last Action Date | 2018-01-31 |
| Last Status | Registration Expired - Pending Cancellation |
| Cancellation Date | 2021-10-02 |
Deregistered Aircraft 2 of 2. This aircraft was previously assigned the N-number N308D.
| Tail Number / N-Number | N308D |
| Manufacturer | LOCKHEED |
| Model | 188C |
| Year Built | 1962 |
| Manufacturer's Serial Number | 1130 |
| Aircraft Type | Fixed wing multi engine |
| Category | Land |
| Builder Certification | Type Certificated |
| Number of Seats | 102 seats |
| Weight Class | CLASS 3 (20,000+ pounds gross take off weight) |
| Engine Manufacturer | ALLISON |
| Engine Model | 501-D13 SER |
| Engine Type | Turbo-prop |
| Number of Engines | 4 engines |
| Horsepower per Engine | 3,750 hp (2,798 kW) |
| Total Horsepower | 15,000 hp (11,190 kW) |
| Average Cruising Speed | 336 miles per hour |
| Type of Registrant | Corporation |
| Owner Name | NEPTUNE AVIATION SERVICES INC |
| Street | 2 CORPORATE WAY |
| City | MISSOULA |
| State | MT |
| Zip Code | 59808-8675 |
| Country | US |
| Airworthiness Classification | Restricted |
| Airworthiness Date | 1976-08-10 |
| Certificate Issue Date | 2003-12-05 |
| Last Action Date | 2003-12-05 |
| Last Status | Valid Registration |
| Cancellation Date | 2006-11-03 |
| Exported To | CANADA |