| Tail Number / N-Number | N21HU |
| Manufacturer | AVIAT INC |
| Model | A-1 |
| Year Built | 1995 |
| Manufacturer's Serial Number | 1291 |
| 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 | LYCOMING |
| Engine Model | O&VO-360 SER |
| Engine Type | Reciprocating |
| Number of Engines | 1 engine |
| Horsepower | 180 hp (134 kW) |
| Type of Registrant | LLC |
| Owner Name | SKYLINE AVIATION LLC |
| Street | 410 SKYLINE DR |
| City | LEWISTOWN |
| State | MT |
| Zip Code | 59457-8012 |
| Region | Northwest Mountain |
| County | Fergus County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Standard |
| Airworthiness Date | 1995-07-24 |
| Certificate Issue Date | 2014-04-07 |
| Last Action Date | 2022-11-28 |
| Expiration Date | 2030-04-30 |
| Status | Valid Registration |
| Mode S Code | 50333753 |
| Mode S Code Hex | A1B7EB |