| Tail Number / N-Number | N20861 |
| Manufacturer | GRUMMAN |
| Model | HU-16D |
| Year Built | 1955 |
| Manufacturer's Serial Number | 141278 |
| Aircraft Type | Fixed wing multi engine |
| Category | Amphibian |
| Builder Certification | Type Certificated |
| Number of Seats | 27 seats |
| Weight Class | CLASS 3 (20,000+ pounds gross take off weight) |
| Engine Manufacturer | WRIGHT |
| Engine Model | R-1820 SER |
| Engine Type | Reciprocating |
| Number of Engines | 2 engines |
| Horsepower per Engine | 1,475 hp (1,100 kW) |
| Total Horsepower | 2,950 hp (2,201 kW) |
| Average Cruising Speed | 187 miles per hour |
| Type of Registrant | LLC |
| Owner Name | UPPER LIMIT LLC |
| Street | PO BOX 520623 |
| City | BIG LAKE |
| State | AK |
| Zip Code | 99652-0623 |
| Region | Alaskan |
| County | Bethel Census Area |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Restricted |
| Airworthiness Date | 1997-12-05 |
| Certificate Issue Date | 2004-01-13 |
| Last Action Date | 2022-08-25 |
| Expiration Date | 2030-01-31 |
| Status | Valid Registration |
| Mode S Code | 50331377 |
| Mode S Code Hex | A1B2FF |