| Tail Number / N-Number | N4221S |
| Manufacturer | AIR TRACTOR INC |
| Model | AT-802A |
| Year Built | 2008 |
| Manufacturer's Serial Number | 802A-0305 |
| Aircraft Type | Fixed wing single engine |
| Category | Land |
| Builder Certification | Type Certificated |
| Number of Seats | 2 seats |
| Weight Class | CLASS 3 (20,000+ pounds gross take off weight) |
| Engine Manufacturer | P&W CANADA |
| Engine Model | PT6A-67AG |
| Engine Type | Turbo-prop |
| Number of Engines | 1 engine |
| Horsepower | 1,350 hp (1,007 kW) |
| Type of Registrant | Corporation |
| Owner Name | TRI ROTOR SPRAY & CHEMICAL |
| Street | 9170 E ROAD 2 |
| City | ULYSSES |
| State | KS |
| Zip Code | 67880-8151 |
| Region | Central |
| County | Grant County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Restricted |
| Airworthiness Date | 2008-10-13 |
| Certificate Issue Date | 2017-05-30 |
| Last Action Date | 2023-01-22 |
| Expiration Date | 2027-05-31 |
| Status | Valid Registration |
| Mode S Code | 51202631 |
| Mode S Code Hex | A50599 |
Deregistered Aircraft 1 of 1. This aircraft was previously assigned the N-number N4221S.
| Tail Number / N-Number | N4221S |
| Manufacturer | SIKORSKY |
| Model | S-61A |
| Year Built | 1976 |
| Manufacturer's Serial Number | 61780 |
| Aircraft Type | Rotorcraft |
| Category | Land |
| Builder Certification | Type Certificated |
| Number of Seats | 28 seats |
| Weight Class | CLASS 2 (12,500 - 19,999 pounds gross take off weight) |
| Number of Engines | 2 engines |
| Average Cruising Speed | 129 miles per hour |
| Type of Registrant | Corporation |
| Owner Name | UNITED TECHNOLOGIES CORP |
| Street | MAIN ST |
| City | STRATFORD |
| State | CT |
| Zip Code | 06602 |
| Region | New England |
| County | Grant County |
| Certificate Issue Date | 1976-11-04 |
| Last Status | Valid Registration |
| Cancellation Date | 1977-01-18 |
| Exported To | MALAYSIA |