Deregistered Aircraft 1 of 2. This aircraft was previously assigned the N-number N51900.
| Tail Number / N-Number | N51900 |
| Manufacturer | SIKORSKY |
| Model | CH37B |
| Manufacturer's Serial Number | 57-1646 |
| Aircraft Type | Rotorcraft |
| Category | Land |
| Builder Certification | Type Certificated |
| Number of Seats | 15 seats |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Number of Engines | 1 engine |
| Average Cruising Speed | 86 miles per hour |
| Type of Registrant | Corporation |
| Owner Name | AIRCRANE INC |
| Street | 1420 PHOENIXVILLE PIKE |
| City | WEST CHESTER |
| State | PA |
| Zip Code | 19380 |
| Country | US |
| Certificate Issue Date | 1978-02-21 |
| Last Action Date | 2009-02-17 |
| Last Status | Registration Expired – Pending Cancellation |
| Cancellation Date | 2014-10-27 |
| Mode S Code | 51502517 |
| Mode S Code Hex | A6854F |
Deregistered Aircraft 2 of 2. This aircraft was previously assigned the N-number N51900.
| Tail Number / N-Number | N51900 |
| Manufacturer | BOEING |
| Model | A75N1 |
| Year Built | 1945 |
| Manufacturer's Serial Number | 75-432 |
| 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 |
| Type of Registrant | Individual |
| Owner Name | BROWN HAROLD W |
| Street | 416 MOREWOOD AVENUE |
| City | PITTSBURGH |
| State | PA |
| Zip Code | 15213 |
| Region | Eastern |
| Certificate Issue Date | 1946-02-07 |
| Last Status | Valid Registration |
| Cancellation Date | 1948-12-03 |
| Mode S Code | 51502517 |
| Mode S Code Hex | A6854F |