Deregistered Aircraft 1 of 1. This aircraft was previously assigned the N-number N75988.
| Tail Number / N-Number | N75988 |
| Manufacturer | SIKORSKY |
| Model | R-4B |
| Manufacturer's Serial Number | 104 |
| 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) |
| Number of Engines | 1 engine |
| Average Cruising Speed | 56 miles per hour |
| Type of Registrant | Government |
| Owner Name | NATIONAL MUSEUM OF NAVAL AVIATION |
| Street | 1750 RADFORD BLVD STE C |
| City | PENSACOLA |
| State | FL |
| Zip Code | 32508 |
| Country | US |
| Certificate Issue Date | 1993-09-08 |
| Last Action Date | 1996-09-18 |
| Last Status | The Triennial Aircraft Registration form was mailed and has not been returned by the Post Office |
| Cancellation Date | 1999-08-19 |
| Mode S Code | 52437411 |
| Mode S Code Hex | AA3F09 |