Laviasa PA-25-235 Aircraft Parts, Equipment, and Tooling List

The Laviasa PA-25-235 is distinguished by its rugged design, reliability, and versatility in agricultural operations, such as crop dusting and aerial spraying. Originally derived from the Piper PA-25 Pawnee, this model was manufactured under license by Laviasa in Argentina and features a powerful 235-horsepower (175 kW) Lycoming engine. Its strong airframe, simple systems, and high payload capacity make it ideal for demanding agricultural environments. The PA-25-235 remains a trusted workhorse due to its efficiency and ease of maintenance.

The Laviasa PA-25-235 includes several key safety features designed for low-altitude agricultural flying. Its robust steel-tube fuselage structure and low-wing configuration enhance stability and durability. The cockpit provides excellent forward visibility, and the fuel and control systems are designed for simplicity and reliability. Additionally, the aircraft’s stall characteristics are forgiving, offering pilots greater control during slow and low operations, which are typical in agricultural use.

The Laviasa PA-25-235 delivers excellent performance for its class, offering a balance of power, payload, and efficiency. With a top speed of around 120 knots (138 mph, or 222 km/h) and a service ceiling of approximately 12,000 feet (3,658 meters), it performs well for both agricultural and utility missions. Its Lycoming O-540 engine provides reliable thrust, enabling quick takeoffs even when carrying heavy loads. Compared to similar aircraft, the PA-25-235 is valued for its reliability and low operating costs.

The Laviasa PA-25-235 is generally not recommended for beginner pilots, as it is designed for specialized agricultural operations requiring precision and experience in low-altitude flying. However, pilots with moderate experience in tailwheel aircraft can adapt to its handling with proper training. Its predictable flight characteristics and stable performance make it manageable for those familiar with single-engine piston aircraft. Training in agricultural flight techniques is essential for safe and effective operation.

Maintenance for the Laviasa PA-25-235 follows a standard piston-engine aircraft schedule, including 50-hour inspections for routine checks and 100-hour inspections for deeper servicing. Special attention should be paid to the engine, propeller, and spray system components, which are subjected to heavy use during agricultural operations. The airframe and control systems require periodic inspection for corrosion and wear due to exposure to chemicals and outdoor storage conditions. Regular preventative maintenance ensures safe and efficient performance throughout its operational life.

The Laviasa PA-25-235 offers limited customization options, as most configurations are tailored to agricultural work. However, operators can equip it with different spray systems, hoppers, or dispersal attachments depending on the type of application. Some models have been modified for towing gliders or light utility operations. The simplicity of its design allows maintenance facilities to adapt systems for specific mission requirements.

The Laviasa PA-25-235 performs reliably in a wide range of weather conditions but is best suited for clear, stable environments typical of agricultural flying. Its sturdy construction and predictable flight characteristics allow for safe operation in moderate winds and turbulence. However, like most single-engine piston aircraft, it is not designed for flight in icing conditions or severe weather. Pilots typically plan operations during favorable daylight hours to maximize safety and efficiency.

The Laviasa PA-25-235 has a range of approximately 450 nautical miles (833 km) when flown at cruise settings. This range allows operators to cover large agricultural areas or fly between job sites without frequent refueling. Its efficient engine and fuel capacity balance endurance with payload, making it a practical choice for sustained daily use.

The Laviasa PA-25-235 is a single-seat aircraft designed for one pilot, with no passenger seating due to its agricultural configuration. The cockpit is compact but ergonomically arranged, providing easy access to flight and spray controls. Some aircraft used for utility purposes may include limited space for small cargo or mission equipment.

The Laviasa PA-25-235 is powered by a Lycoming O-540-B2B5 engine, producing 235 horsepower (175 kW). This six-cylinder, air-cooled engine delivers strong, consistent performance ideal for agricultural applications. The engine’s reliability and wide availability of parts make it cost-effective to maintain. Its robust power output supports efficient takeoffs and climbs, even under heavy operational loads.

The Laviasa PA-25-235 has a useful load of approximately 1,200 lbs (544 kg), depending on configuration and equipment. This capacity allows it to carry a full chemical hopper, fuel, and pilot without compromising performance. The aircraft’s durable airframe and powerful engine make it well-suited for lifting heavy agricultural payloads safely and efficiently.

The Laviasa PA-25 series comprises several variants, including the PA-25-150, PA-25-235, and PA-25-260, which differ primarily in engine power and performance. The PA-25-235 offers a midrange balance of power and efficiency, while the PA-25-260 features an upgraded engine for heavier payloads and improved climb rates. These differences enable operators to select the model that best suits their operational and budgetary requirements.

The Laviasa PA-25-235 has a cruising speed of approximately 100 knots (115 mph, or 185 km/h). This speed provides an optimal balance between fuel efficiency and operational performance during spraying or ferry flights. Its steady cruise characteristics ensure precise application and easy control at low altitudes.

Yes, the Laviasa PA-25-235 can operate from short or unpaved runways, a key advantage for agricultural operations. Its rugged landing gear and tailwheel design are built to handle rough field conditions. With its powerful engine and low takeoff distance requirements, it can easily depart from and land on rural airstrips or agricultural fields.

The Laviasa PA-25-235’s cockpit is designed for practicality rather than luxury, offering a straightforward layout suited for long working days. The seating position offers excellent visibility, which is crucial for precise spraying. While not as comfortable as passenger aircraft, its ergonomic controls and vibration-dampened seat reduce pilot fatigue during extended operations.

The Laviasa PA-25-235 typically features basic VFR avionics, including a communication radio, transponder, and engine monitoring gauges. Some operators may incorporate GPS-based spray control systems or mapping tools to enhance precision in agricultural work. Modern upgrades such as digital displays and weather monitoring can also be integrated for enhanced situational awareness.

As an agricultural aircraft, the Laviasa PA-25-235 has minimal luggage capacity, with limited space behind the seat for essential gear or tools. This area can typically hold about 20 to 30 lbs (9 to 14 kg) of equipment. Its design prioritizes chemical and fuel storage rather than personal cargo, ensuring optimal performance for agricultural missions.