Deregistered Aircraft 1 of 1. This aircraft was previously assigned the N-number N9991M.
| Tail Number / N-Number | N9991M |
| Manufacturer | BROWN CHARLES REIFF |
| Model | PITTS SPECIAL S-1E |
| Year Built | 1981 |
| Manufacturer's Serial Number | 7-0334 |
| Aircraft Type | Fixed wing single engine |
| 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) |
| Engine Manufacturer | LYCOMING |
| Engine Model | I0360 SER |
| Engine Type | Reciprocating |
| Number of Engines | 1 engine |
| Horsepower | 180 hp (134 kW) |
| Type of Registrant | Corporation |
| Owner Name | STONE AIR INC |
| Street | 4 PENNY LANE CT |
| City | WILMINGTON |
| State | DE |
| Zip Code | 19803-4022 |
| Country | US |
| Airworthiness Classification | Experimental |
| Airworthiness Date | 1982-12-03 |
| Certificate Issue Date | 2000-09-07 |
| Last Action Date | 2007-01-05 |
| Last Status | Registration Expired – Pending Cancellation |
| Cancellation Date | 2017-07-14 |
| Mode S Code | 53373231 |
| Mode S Code Hex | ADF699 |