Air Tractor AT-402

Overview

The Air Tractor AT-402 is a definitive step up in the agricultural aviation world, bridging the gap between the smaller 300-series and the heavy-lifting 500-series. Primarily powered by the Pratt & Whitney PT6A-15AG, the AT-402 (and its refined sibling, the AT-402B) offers the “Turbine Advantage”: faster ferry speeds, shorter loaded takeoff rolls, and significantly reduced pilot fatigue compared to radial-engine predecessors. It is arguably the most famous Air Tractor in popular culture, serving as the real-world inspiration for “Dusty Crophopper” in Disney’s Planes.

Key Features for GA Buyers

• Turbine Efficiency: The PT6A engine provides 680 SHP, offering exceptional reliability and simpler power management than large piston radials.
• Increased Capacity: Features a 400-gallon hopper, making it highly productive for medium-sized liquid or dry chemical application jobs.
• Rugged Construction: Built with a specialized steel alloy lower wing spar cap for an extended fatigue life and reinforced leading edges for birdstrike protection.
• Modern Handling: The AT-402B variant introduced Hoerner wingtips and aileron boost tabs, which provide lighter, more responsive control feel during the constant turns required in ag-work.

Trade-offs

• Specialized Role: As a dedicated agricultural aircraft, it lacks a standard passenger cabin; while a two-seat trainer/ground-crew option (AT-402B) exists, it is not a cross-country traveler.
• High Initial Investment: Transitioning to a turbine airframe involves a higher purchase price and higher fuel flow (JET-A) compared to piston ag-planes, though maintenance costs over time are often lower.
• Restricted Category: These aircraft are certified under the Restricted Category, meaning they cannot be used for standard personal transport or over-congested areas for non-work purposes.