| Tail Number / N-Number | N3939H |
| Manufacturer | ENGINEERING & RESEARCH |
| Model | ERCOUPE 415-CD |
| Year Built | 1947 |
| Manufacturer's Serial Number | 4640 |
| 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 | A&C75 SERIES |
| Engine Type | Reciprocating |
| Number of Engines | 1 engine |
| Horsepower | 75 hp (56 kW) |
| Average Cruising Speed | 90 miles per hour |
| Type of Registrant | LLC |
| Owner Name | COUPE NH LLC |
| Street | PO BOX 1165 |
| City | EAST HELENA |
| State | MT |
| Zip Code | 59635-1165 |
| Region | Northwest Mountain |
| County | Lewis and Clark County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Standard |
| Airworthiness Date | 1955-12-19 |
| Certificate Issue Date | 2022-12-26 |
| Last Action Date | 2022-12-26 |
| Expiration Date | 2029-12-31 |
| Status | Valid Registration |
| Mode S Code | 51110611 |
| Mode S Code Hex | A49189 |