1992 Air Tractor AT-401: A Recently Overhauled Workhorse Ready to Fly

The Air Tractor AT-401 has long stood as a staple in the agricultural aviation industry, and the 1992 model—registration number N1546X—continues this legacy with renewed vigor. This specific AT-401 is a pristine example of a well-maintained ag aircraft that combines proven utility with a recent overhaul that enhances its reliability and performance. With auction dates set from June 25 to July 2, 2025, this aircraft represents a rare opportunity for buyers looking for a powerful, freshly renewed tool of the trade.

Air Tractor and the Legacy of the AT-401

Founded in 1972 by aviation innovator Leland Snow, Air Tractor, Inc. has built a name synonymous with robust, efficient agricultural aircraft. Located in Olney, Texas, the company emerged as a leader in the aerial application market with a focus on safety, productivity, and field performance. Air Tractor’s reputation was built around designing aircraft capable of heavy payloads, precise application, and sustained reliability under demanding conditions.

The AT-401, introduced in the 1970s, bridged the gap between piston and turbine platforms, using a high-power radial engine to maximize thrust and load capacity. With its rugged airframe and proven aerodynamics, the AT-401 quickly became a favorite among crop dusters and aerial applicators. It was designed specifically for low-level flying and quick turnaround between fields, prioritizing effectiveness in tight operating windows.

More than just an ag plane, the AT-401 is a reliable tool in fire control, fertilizer distribution, and pest eradication. Decades later, these aircraft remain in widespread use thanks to their straightforward maintenance and battle-tested engineering.

A Strong Performer with a Recent Overhaul

This 1992 Air Tractor AT-401 (N1546X) is more than just a legacy aircraft—it’s a recently overhauled machine that’s clean, sharp, and ready to work. With 7,192 total hours, its core components have been renewed to high standards, including engine and propeller overhauls in 2015. These investments in core systems provide new life to the aircraft and make it a standout option for serious operators.

The fresh paint, low-time hopper, and complete lack of corrosion reflect how well this aircraft has been cared for. Add working air conditioning, and you’ve got an operator-friendly cockpit to go along with a well-balanced and steady flight experience.

Whether you’re a seasoned aerial applicator or an operator expanding your fleet, N1546X offers a solid value proposition: high performance, recent overhaul, and reliable service ahead.

Airframe

The airframe of this AT-401 is in excellent condition. Registered under N1546X and bearing serial number 401-0874, the aircraft has 7,192 hours total time. Notably, the Annual Inspection was completed on November 1, 2024, ensuring compliance and flight-readiness through the next season.

Built for resilience, the AT-401 features robust construction with a useful load of 1,605 pounds, giving operators the capacity for high-volume spraying and chemical application. The 120-gallon fuel capacity allows for efficient operations with a range of 500 nautical miles and a cruise speed of 130 mph—a balanced performance profile for covering large territories.

Stall speeds are 73 mph (flaps up) and 61 mph (flaps down), aiding in safer approaches and smooth landings, even under varying field conditions. This machine is ready to perform where it counts: low, slow, and steady in the field.

Engine

Under the cowling is a Pratt & Whitney R-1340-AN-1 radial engine, delivering 600 horsepower. Known for its durability and raw torque, this engine model has powered everything from WWII trainers to heavy-duty ag aircraft. It’s ideally matched for the AT-401’s mission profile.

The engine on this specific aircraft was overhauled by Younkin Aviation Inc. on August 31, 2015 and currently has just 371 hours since major overhaul (SMOH)—a significant advantage for buyers looking for service-ready performance without the upfront cost of engine work.

Recent overhauls like this one breathe new life into classic ag aircraft, ensuring reliability while also reducing short-term maintenance costs. This powerplant still has years of productive flying ahead.

Propeller

Paired with the powerful radial engine is a Hamilton Standard 12D40 two-blade constant-speed propeller, providing thrust consistency across varying power settings. Overhauled by San Antonio Propeller Service, Inc. on April 28, 2015, the prop has also logged 371 hours SMOH, matching the engine overhaul.

The aluminum propeller blades (model 610-1A-12) bear serial numbers 6287 and 31640, and exhibit no known flaws, cracks, or wear issues. Its recent overhaul ensures optimal blade performance and reduced vibration—translating into smoother operations and less wear on the engine and airframe.

Avionics

The avionics package is well-suited for agricultural missions, providing a mix of analog reliability and GPS precision:

• Bendix King KX 155 Nav/Com
  
• Bendix King KY 196A Com
  
• Garmin GNC 250XL
  
• Horizon P-1000 Digital Engine Tachometer
  
• Satloc M3 GPS for accurate application tracking
  
• Attitude Indicator
  
• Turn Coordinator
  
• Oil Pressure/Temperature Gauges
  
• Voltmeter, Hopper Gauge
  
• Altimeter, Airspeed Indicator
  
• Manifold Pressure Gauge
  
• Fuel and Fuel Pressure Gauges
  

While the aircraft is not IFR capable, the system is more than adequate for VFR agricultural work. The inclusion of Satloc M3 GPS enhances the precision of application—critical for modern aerial spraying operations.

Exterior

Visually, this Air Tractor presents like a newly delivered aircraft. It features a bright yellow paint job accented with blue and black trim, giving it standout ramp appeal and improved visibility in the field. The paint is recent, evenly applied, and exhibits no signs of wear, bubbling, or corrosion—common issues on aging ag aircraft that are absent here.

The corrosion-free airframe ensures structural longevity and boosts the aircraft’s residual value.

Interior

Inside the cockpit, simplicity meets function. The cabin features a tan fabric pilot seat against a yellow interior shell, giving the aircraft a clean and coordinated look.

Functionality takes priority in the AT-401’s cockpit, and this aircraft is no exception. The layout is optimized for ease of access to critical gauges and controls, and the air conditioning system ensures pilot comfort even on long, hot spraying days.

The single-seat configuration provides excellent visibility and ergonomics, critical for long operational hours and precision flying.

Additional Features

This aircraft comes with a suite of features that add both utility and value:

• Air Conditioning — A luxury in many ag aircraft, this improves operator endurance.
  
• Vortex Generators — Enhance slow-speed handling and stall characteristics.
  
• No Known Flaws or Damage History — Clean logs and no incidents reported.
  
• Complete Logbooks — No gaps or missing documentation, which is rare in ag aircraft of this vintage.
  

With no known corrosion and a maintenance history reflecting ownership pride, N1546X is a reliable, field-ready platform.

Auction Information

This clean and freshly overhauled 1992 Air Tractor AT-401—Registration N1546X—will be available for bidding from:

June 25 to July 2, 2025, with bidding closing at 12:00 PM CDT.

• Auction Location: San Antonio
  
• Required Deposit: $3,000
  
• Buyer’s Premium: 6%
  

With only two owners, a low-time hopper, and fresh updates to core systems, this aircraft is ideal for operators who need a dependable ag workhorse that can deliver immediately. This is not a fixer-upper—it’s a performer, ready to generate revenue right after closing.

Conclusion

The 1992 Air Tractor AT-401, serial number 401-0874, is a remarkable example of how a classic ag aircraft can be revitalized for modern service. With its recent engine and propeller overhauls, fresh paint, and clean mechanical record, N1546X presents a reliable and capable option for agricultural professionals who demand performance and value.

Backed by the pedigree of Air Tractor’s engineering and updated by expert overhaul teams, this aircraft stands ready to deliver precise, efficient field operations for years to come. Whether you’re upgrading your fleet or seeking a dependable first buy, this AT-401 delivers on all fronts.

Place your bid between June 25 and July 2, 2025, and take command of an aircraft that’s been meticulously restored, professionally maintained, and ready to work.

Specifications and/or descriptions are provided as introductory information only and do not constitute representations or warranties. Verification of specifications remain the sole responsibility of purchaser.