| Tail Number / N-Number | N904ER |
| Manufacturer | DIAMOND AIRCRAFT IND GMBH |
| Model | DA 42 |
| Manufacturer's Serial Number | 42.281 |
| Aircraft Type | Fixed wing multi engine |
| Category | Land |
| Builder Certification | Type Certificated |
| Number of Seats | 4 seats |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Number of Engines | 2 engines |
| Type of Registrant | LLC |
| Owner Name | HEAVY METAL AIR LLC |
| Street | 7150 REPUBLIC AIRPORT STE 101 |
| City | FARMINGDALE |
| State | NY |
| Zip Code | 11735-3999 |
| Region | Eastern |
| County | Nassau County |
| Country | US |
| Fractional Ownership | No |
| Certificate Issue Date | 2018-08-25 |
| Last Action Date | 2021-04-05 |
| Expiration Date | 2028-08-31 |
| Status | Valid Registration |
| Mode S Code | 53077174 |
| Mode S Code Hex | AC7E7C |