Air Tractor AT-402B Aircraft Parts, Equipment, and Tooling List

The Air Tractor AT-402B stands out for its combination of turbine engine performance and efficient airframe design, delivering excellent value and productivity for aerial application operators. Its 550 horsepower Pratt & Whitney PT6A-15AG engine offers a balance of power and fuel efficiency, making it a cost-effective choice for many operators. The redesigned high-volume wing improves spray coverage while enhancing low-speed handling and stability. Its 400-gallon hopper capacity allows for fewer reloads per mission, which increases operational efficiency. The rugged fixed landing gear also supports reliable use from grass or unimproved runways.

The AT-402B incorporates several safety-focused design elements, including robust structural construction and high-visibility cockpit design to reduce pilot fatigue and enhance situational awareness. Its stall-resistant wing profile improves control at low speeds, especially during low-altitude spray passes. The PT6A turbine engine is known for its reliability and smooth power delivery, reducing the risk of engine-related issues in demanding flight environments. Additionally, the cockpit layout is designed for intuitive operation, helping pilots maintain focus during complex spraying operations.

The AT-402B offers a strong balance of performance and economy in the light turbine category. With a cruising speed around 160 knots (184 mph, or 296 km/h) and enhanced climb performance from its 550 horsepower turbine engine, it performs more efficiently than many piston-powered alternatives. Its large hopper, efficient spray system, and wing design allow for effective coverage while maintaining excellent maneuverability. Operators appreciate its ability to handle a wide range of field conditions without compromising performance or control.

Yes, the AT-402B is specifically designed to operate from short or unimproved airstrips, including grass and dirt runways. Its fixed landing gear is rugged and built to withstand repeated takeoffs and landings in remote field conditions. This operational flexibility makes it ideal for agricultural work where proximity to fields is critical. The aircraft’s takeoff and landing performance is optimized for field access rather than paved runways.

The AT-402B follows a regular maintenance schedule that includes routine daily and preflight inspections, time-based component checks, and an annual inspection in accordance with FAA requirements. The PT6A turbine engine benefits from long service intervals and is supported by a broad global maintenance network. Maintenance requirements are straightforward, with easily accessible systems and components that minimize downtime. Many operators also implement preventative maintenance programs to extend aircraft life and reduce unexpected repairs.

The AT-402B provides stable handling characteristics in a wide range of field conditions, including variable winds and moderate turbulence. Its high-wing configuration and stall-tolerant design enhance low-speed control and responsiveness during low-level spray passes. While it is capable of flying in less-than-ideal conditions, pilots should always evaluate weather carefully due to the low-altitude nature of agricultural flying. The PT6A turbine engine also maintains consistent performance across varying temperature and humidity levels.

The AT-402B has a typical range of approximately 435 nautical miles (805 kilometers), depending on load, weather, and flight profile. This allows for efficient ferry flights between job sites or for reaching fields located farther from the home base. The aircraft’s operational range supports long workdays without frequent refueling, which is especially valuable during peak spraying seasons.

The AT-402B is powered by a Pratt & Whitney PT6A-15AG turbine engine, producing 550 horsepower. This engine is well known for its reliability, ease of maintenance, and strong performance across various operating conditions. The PT6A family has a long track record in agricultural aviation and provides smooth, consistent power delivery for demanding low-level flight operations.

The useful load of the AT-402B is approximately 4,000 pounds (1,814 kilograms), which includes fuel, pilot, and chemical load in the hopper. This capacity supports high-volume spraying missions and reduces the need for frequent reloads during application runs. The aircraft’s structure and landing gear are engineered to support this weight while maintaining performance and control.

The AT-402B is part of the Air Tractor 400 series, which also includes earlier models like the AT-401 and AT-400. Compared to those, the AT-402B integrates a turbine engine instead of a radial or piston engine, offering improved reliability and lower operating costs. Its airframe and wing design were updated to increase strength, improve aerodynamics, and optimize spray efficiency. The 402B variant is widely preferred for its balance of power, payload, and cost-effectiveness in light turbine operations.

The AT-402B can be equipped with a range of avionics suited for agricultural operations, including GPS-guided spray systems, light bars, and flow control monitors. Many operators install advanced ag-specific tools to enhance precision and reduce chemical waste. Standard avionics can include a basic communication and navigation suite, but most aircraft are customized to the operator’s preferences. These upgrades improve efficiency and contribute to safer, more accurate field coverage.