Deregistered Aircraft 1 of 1. This aircraft was previously assigned the N-number N3931C.
| Tail Number / N-Number | N3931C |
| Manufacturer | SIKORSKY |
| Model | R-6A |
| Year Built | 1952 |
| Manufacturer's Serial Number | 4345463 |
| Aircraft Type | Rotorcraft |
| Category | Amphibian |
| Builder Certification | Type Certificated |
| Number of Seats | 3 seats |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Engine Manufacturer | FRANKLIN |
| Engine Model | 6V6 SERIES |
| Engine Type | Reciprocating |
| Number of Engines | 1 engine |
| Horsepower | 245 hp (183 kW) |
| Average Cruising Speed | 75 miles per hour |
| Type of Registrant | Corporation |
| Owner Name | NATIONAL URANIUM CORP |
| Street | 89 BROAD ST |
| City | NEW YORK |
| State | NY |
| Zip Code | 10000 |
| Country | US |
| Last Action Date | 1977-01-14 |
| Last Status | Revoked – Canceled |
| Cancellation Date | 2011-07-26 |
| Mode S Code | 51110154 |
| Mode S Code Hex | A4906C |