What is COR on Boeing 737? (Corrector)

The Boeing 737 aircraft is one of the most widely recognized and utilized commercial jetliners in the world. Known for its reliability, efficiency, and safety, the Boeing 737 has played a significant role in shaping the aviation industry. However, there are many technical aspects of this aircraft that may seem complex to the average person. In this article, we will delve into one such aspect, the Corrector on the Boeing 737, abbreviated as COR. By understanding the function and importance of the Corrector, we can gain a deeper insight into the inner workings of this remarkable aircraft.

The Role of the Corrector on the Boeing 737

The Corrector, or COR, is a crucial component of the flight control system on the Boeing 737. It is responsible for adjusting the ailerons and the elevator trim to ensure the aircraft’s stability and maneuverability during flight. The primary function of the Corrector is to correct any deviations from the desired flight path or attitude, making it an essential part of the flight control system.

Specifically, the Corrector uses sophisticated sensors and actuators to detect and counteract any unwanted movements or forces acting on the aircraft. It analyzes data from various sources, such as the aircraft’s sensors, control inputs from the pilots, and external factors like wind conditions. Based on this analysis, the Corrector determines the appropriate adjustments needed to maintain the aircraft’s stability.

The Corrector is particularly important during critical flight phases such as takeoff, landing, and during adverse weather conditions. It works in tandem with other flight control components to ensure the aircraft responds correctly to the pilot’s inputs and external factors, allowing for safe and precise flying.

Additionally, the Corrector also contributes to the fuel efficiency of the Boeing 737. By constantly monitoring and making minor adjustments to the flight control surfaces, the Corrector helps reduce drag and optimize the aircraft’s aerodynamic performance. This improved efficiency translates into cost savings for airlines and a reduced environmental impact.

The Implementation of the Corrector on the Boeing 737

The Corrector on the Boeing 737 is a highly sophisticated system that integrates various technologies and components. To understand its implementation, let’s explore the key elements of the Corrector:

1. Actuators: The Corrector utilizes hydraulic or electric actuators to move the flight control surfaces, namely the ailerons and the elevator trim. These actuators receive signals from the Corrector to execute the necessary adjustments in real-time.

2. Sensors: The Corrector relies on a network of sensors to gather crucial data about the aircraft’s flight parameters, such as its pitch, roll, yaw, airspeed, and altitude. These sensors include accelerometers, gyroscopes, air data sensors, and angle of attack sensors.

3. Flight Control Computer: The Corrector functions in conjunction with the aircraft’s flight control computer, which receives inputs from the pilots and other systems. The flight control computer processes this information and sends appropriate signals to the Corrector for making necessary adjustments to the flight control surfaces.

4. Redundancy and Safety: The implementation of the Corrector on the Boeing 737 ensures redundancy and safety. It incorporates multiple sensors and actuators, providing backup and fail-safe mechanisms to prevent single-point failures. The redundancy of critical components improves the reliability and overall safety of the aircraft.

5. Maintenance and Procedural Checks: The Corrector undergoes regular maintenance and procedural checks to ensure its optimal performance. The aircraft’s maintenance team conducts inspections, tests, and calibrations on the Corrector to verify its proper functioning and adherence to safety standards.

The Significance of the Corrector on the Boeing 737

The Corrector plays a crucial role in maintaining the flight characteristics and safety of the Boeing 737. Its significance can be understood through the following key points:

1. Enhanced Safety: By continuously monitoring the aircraft’s flight parameters and making minute adjustments, the Corrector ensures the Boeing 737 remains stable and responsive. This enhances safety during critical flight phases and when faced with unexpected external factors.

2. Improved Maneuverability: The Corrector allows for precise control and maneuverability of the aircraft. Pilots can rely on the Corrector to make necessary adjustments, providing a more enjoyable flying experience for passengers and optimizing the aircraft’s performance.

3. Fuel Efficiency: With its ability to optimize the aircraft’s aerodynamic performance, the Corrector contributes to fuel efficiency. Even small adjustments made by the Corrector can result in significant fuel savings over the course of a flight, benefiting both airlines and the environment.

Overall, the Corrector on the Boeing 737 exemplifies the precision and advanced technology behind this iconic aircraft. Its role in maintaining stability, enhancing safety, and improving fuel efficiency highlights the importance of this essential component within the broader flight control system.


The Corrector, abbreviated as COR, is a fundamental part of the flight control system on the Boeing 737. Its responsibility in adjusting the ailerons and elevator trim to ensure stability and maneuverability during flight demonstrates its significance. With its integration of sensors, actuators, and a flight control computer, the Corrector contributes to enhanced safety, improved airplane performance, and reduced fuel consumption. Understanding the Corrector on the Boeing 737 provides valuable insights into the engineering excellence and innovative technologies behind this remarkable aircraft.

For More: What is IDENT on Boeing 737? (Identification – Transponder Function)