| Tail Number / N-Number | N958BM |
| Manufacturer | BRAD G MARCUM |
| Model | THATCHER CX4 |
| Year Built | 2019 |
| Manufacturer's Serial Number | 179 |
| 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 | REVMASTER |
| Engine Model | 2100D |
| Engine Type | Reciprocating |
| Number of Engines | 1 engine |
| Horsepower | 65 hp (48 kW) |
| Type of Registrant | Individual |
| Owner Name | MARCUM BRAD G |
| Street | 9010 GOTHIC DR |
| City | UNIVERSAL CITY |
| State | TX |
| Zip Code | 78148-2852 |
| Region | Southwestern |
| County | Bexar County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Experimental |
| Airworthiness Date | 2019-04-08 |
| Certificate Issue Date | 2018-08-23 |
| Last Action Date | 2021-03-12 |
| Expiration Date | 2028-08-31 |
| Status | Valid Registration |
| Mode S Code | 53251204 |
| Mode S Code Hex | AD5284 |