| Tail Number / N-Number | N42GL |
| Manufacturer | GRUMMAN |
| Model | G-21A |
| Manufacturer's Serial Number | B-52 |
| Aircraft Type | Fixed wing multi engine |
| Category | Amphibian |
| Builder Certification | Type Certificated |
| Number of Seats | 8 seats |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Engine Manufacturer | P&W |
| Engine Model | R-985 SERIES |
| Engine Type | Reciprocating |
| Number of Engines | 2 engines |
| Horsepower per Engine | 450 hp (336 kW) |
| Total Horsepower | 900 hp (671 kW) |
| Average Cruising Speed | 150 miles per hour |
| Type of Registrant | Individual |
| Owner Name | REGISTRATION PENDING |
| Street | PO BOX 1840 |
| City | HELENA |
| State | MT |
| Zip Code | 59601 |
| Region | Northwest Mountain |
| County | Lewis and Clark County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Experimental |
| Airworthiness Date | 1994-05-06 |
| Last Action Date | 2023-01-18 |
| Status | Registration pending |
| Mode S Code | 51174747 |
| Mode S Code Hex | A4F9E7 |