| Tail Number / N-Number | N4903S |
| Manufacturer | LANG JOHN F |
| Model | CGS HAWK |
| Year Built | 1984 |
| Manufacturer's Serial Number | 359 |
| 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 | KAWASAKI |
| Engine Model | ALL MDLS A/B |
| Engine Type | Reciprocating |
| Number of Engines | 1 engine |
| Type of Registrant | Individual |
| Owner Name | LANG JOHN F |
| Street | 7337 N LUCE RD |
| City | ALMA |
| State | MI |
| Zip Code | 48801 |
| Region | Great Lakes |
| County | Gratiot County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Experimental |
| Airworthiness Date | 1984-11-05 |
| Certificate Issue Date | 1984-05-01 |
| Last Action Date | 2023-01-22 |
| Expiration Date | 2027-06-30 |
| Status | Valid Registration |
| Mode S Code | 51411352 |
| Mode S Code Hex | A612EA |