| Tail Number / N-Number | N21HL |
| Manufacturer | PIPER |
| Model | PA-31-350 |
| Manufacturer's Serial Number | 31-8152126 |
| Aircraft Type | Fixed wing multi engine |
| Category | Land |
| Builder Certification | Type Certificated |
| Number of Seats | 8 seats |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Engine Manufacturer | LYCOMING |
| Engine Model | TI0-540 SER |
| Engine Type | Turbo-prop |
| Number of Engines | 2 engines |
| Horsepower per Engine | 310 hp (231 kW) |
| Total Horsepower | 620 hp (463 kW) |
| Average Cruising Speed | 162 miles per hour |
| Type of Registrant | Corporation |
| Owner Name | CHIEFTAIN AVIATION INC |
| Street | 4483 PARK PLACE TER |
| City | MARIETTA |
| State | GA |
| Zip Code | 30066-1744 |
| Region | Southern |
| County | Cobb County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Standard |
| Airworthiness Date | 1981-05-21 |
| Certificate Issue Date | 2016-05-06 |
| Last Action Date | 2022-04-11 |
| Expiration Date | 2029-05-31 |
| Status | Valid Registration |
| Mode S Code | 50333743 |
| Mode S Code Hex | A1B7E3 |