Deregistered Aircraft 1 of 1. This aircraft was previously assigned the N-number N56BT.
| Tail Number / N-Number | N56BT |
| Manufacturer | GREER JOSEPH B JR |
| Model | BD-4 |
| Year Built | 1984 |
| Manufacturer's Serial Number | 97 |
| Aircraft Type | Fixed wing single engine |
| Category | Land |
| Builder Certification | Not Type Certificated |
| Number of Seats | 4 seats |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Engine Manufacturer | LYCOMING |
| Engine Model | 0-320 SERIES |
| Engine Type | Reciprocating |
| Number of Engines | 1 engine |
| Horsepower | 180 hp (134 kW) |
| Type of Registrant | Corporation |
| Owner Name | SOUTHERN MUSEUM OF FLIGHT FOUNDATION INC |
| Street | 4343 73RD ST N |
| City | BIRMINGHAM |
| State | AL |
| Zip Code | 35206-3642 |
| Country | US |
| Airworthiness Classification | Experimental |
| Airworthiness Date | 1986-07-30 |
| Certificate Issue Date | 1999-03-03 |
| Last Action Date | 2008-03-18 |
| Last Status | Third Notice for Re-Registration/Renewal |
| Cancellation Date | 2016-11-16 |
| Mode S Code | 51622274 |
| Mode S Code Hex | A724BC |