| Tail Number / N-Number | N321HA |
| Manufacturer | CESSNA |
| Model | 421B |
| Year Built | 1973 |
| Manufacturer's Serial Number | 421B0420 |
| 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 | CONT MOTOR |
| Engine Model | GTSIO-520 SER |
| Engine Type | Turbo-prop |
| Number of Engines | 2 engines |
| Horsepower per Engine | 435 hp (325 kW) |
| Total Horsepower | 870 hp (649 kW) |
| Average Cruising Speed | 172 miles per hour |
| Type of Registrant | LLC |
| Owner Name | SKYTOOK LLC |
| Street | 1209 ORANGE ST |
| City | WILMINGTON |
| State | DE |
| Zip Code | 19801 |
| Region | Eastern |
| County | New Castle County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Standard |
| Airworthiness Date | 1973-06-01 |
| Certificate Issue Date | 2014-07-15 |
| Last Action Date | 2020-03-23 |
| Expiration Date | 2027-07-31 |
| Status | Valid Registration |
| Mode S Code | 50671267 |
| Mode S Code Hex | A372B7 |
Deregistered Aircraft 1 of 1. This aircraft was previously assigned the N-number N321HA.
| Tail Number / N-Number | N321HA |
| Manufacturer | DOUGLAS |
| Model | DC3C |
| Manufacturer's Serial Number | 4519 |
| Aircraft Type | Fixed wing multi engine |
| Category | Land |
| Builder Certification | Type Certificated |
| Number of Seats | 32 seats |
| Weight Class | CLASS 3 (20,000+ pounds gross take off weight) |
| Number of Engines | 2 engines |
| Type of Registrant | Corporation |
| Owner Name | HOUSTON AIRCRAFT SERVICE INC |
| Street | 7700 ARPT BLVD |
| City | HOUSTON |
| State | TX |
| Zip Code | 77017 |
| Region | Southwestern |
| County | New Castle County |
| Certificate Issue Date | 1971-03-31 |
| Last Status | Valid Registration |
| Cancellation Date | 1971-11-09 |
| Exported To | NICARAGUA |