Deregistered Aircraft 1 of 2. This aircraft was previously assigned the N-number N37512.
| Tail Number / N-Number | N37512 |
| Manufacturer | HOLTZ STUART A |
| Model | HOLTZ B-8M |
| Manufacturer's Serial Number | 1 |
| 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 | HOLTZ STUART A |
| Street | W304 N 2368B MAPLE AVE |
| City | PEWAUKEE |
| State | WI |
| Zip Code | 53072 |
| Country | US |
| Certificate Issue Date | 1980-04-09 |
| Last Action Date | 1983-04-04 |
| Last Status | Registration Expired – Pending Cancellation |
| Cancellation Date | 2013-06-04 |
| Mode S Code | 51044364 |
| Mode S Code Hex | A448F4 |
Deregistered Aircraft 2 of 2. This aircraft was previously assigned the N-number N37512.
| Tail Number / N-Number | N37512 |
| Manufacturer | DOUGLAS |
| Model | DC-6 |
| Manufacturer's Serial Number | 43001 |
| Aircraft Type | Fixed wing multi engine |
| Category | Land |
| Builder Certification | Type Certificated |
| Number of Seats | 96 seats |
| Weight Class | CLASS 3 (20,000+ pounds gross take off weight) |
| Number of Engines | 4 engines |
| Average Cruising Speed | 225 miles per hour |
| Type of Registrant | Corporation |
| Owner Name | UNITED AIR LINES INC |
| Street | 5959 S CICERO AVE |
| City | CHICAGO |
| State | IL |
| Zip Code | 60021 |
| Region | Great Lakes |
| Certificate Issue Date | 1947-06-16 |
| Last Status | Valid Registration |
| Cancellation Date | 1970-07-02 |
| Mode S Code | 51044364 |
| Mode S Code Hex | A448F4 |