| Tail Number / N-Number | N21JW |
| Manufacturer | ENGINEERING & RESEARCH |
| Model | ERCOUPE 415-D |
| Year Built | 1946 |
| Manufacturer's Serial Number | 2358 |
| Aircraft Type | Fixed wing single engine |
| Category | Land |
| Builder Certification | Type Certificated |
| Number of Seats | 2 seats |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Engine Manufacturer | CONT MOTOR |
| Engine Model | C85 SERIES |
| Engine Type | Reciprocating |
| Number of Engines | 1 engine |
| Horsepower | 85 hp (63 kW) |
| Average Cruising Speed | 90 miles per hour |
| Type of Registrant | LLC |
| Owner Name | MAXIMUS AVIATION LLC |
| Street | 1620 CENTRAL AVE RM 202 |
| City | CHEYENNE |
| State | WY |
| Zip Code | 82001-4575 |
| Region | Northwest Mountain |
| County | Laramie County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Standard |
| Airworthiness Date | 1956-06-23 |
| Certificate Issue Date | 2020-08-21 |
| Last Action Date | 2020-08-21 |
| Expiration Date | 2027-08-31 |
| Status | Valid Registration |
| Mode S Code | 50334006 |
| Mode S Code Hex | A1B806 |