What is RCH on Airbus A330? (Small Unit Of Measurement)

The Airbus A330 is a popular wide-body twin-engine jet airliner manufactured by Airbus. It is widely used by airlines around the world for both short and long-haul flights. As a highly advanced aircraft, the A330 incorporates various units of measurement to ensure optimal performance and safety. One of these units, with its abbreviation as RCH, plays a crucial role in the aircraft’s functioning. In this article, we will explore what this small unit of measurement is and its significance on the Airbus A330.

Understanding the Small Unit of Measurement (RCH)

The small unit of measurement on the Airbus A330, referred to as RCH, stands for “Radio Control Handle.” It is a component found in the cockpit that enables pilots to control various radio functions and communication systems onboard the aircraft. The RCH allows pilots to manage the aircraft’s communication with air traffic control, other aircraft, and ground personnel.

The RCH is a multifunctional control lever that features several buttons and switches, each serving a specific purpose. It is typically located on the center pedestal of the cockpit, within easy reach of the pilot and copilot. By manipulating the RCH, pilots can tune the aircraft’s radio frequencies, adjust volume levels, and engage in two-way communication effectively.

One of the primary functions of the RCH is to control the aircraft’s Very High Frequency (VHF) radios. These radios enable pilots to communicate with air traffic control and receive important updates on weather conditions, route clearances, and any potential hazards in their flight path. The RCH allows pilots to select the desired radio frequencies, such as the tower, ground, or departure frequencies, and transmit and receive messages accordingly.

Additionally, the RCH also plays a crucial role in managing the aircraft’s Emergency Locator Transmitter (ELT). The ELT is an important safety feature on the Airbus A330 that automatically transmits distress signals to search and rescue teams in the event of an emergency. The RCH allows pilots to activate or deactivate the ELT, ensuring that it is operational when needed and prevents accidental activation during routine operations.

Overall, the small unit of measurement known as RCH on the Airbus A330 is a vital component that enables pilots to control and manage the aircraft’s radio functions, ensuring effective communication and optimal safety during flight operations.

The Significance of RCH on the Airbus A330

The RCH on the Airbus A330 holds significant importance for the aircraft’s overall performance and safety. Effective communication is crucial in aviation, and the RCH allows pilots to establish clear and concise communication channels with air traffic control and other relevant parties.

By operating the RCH, pilots can quickly and accurately tune in to the appropriate radio frequencies, ensuring they receive and transmit messages to the correct recipients. This helps in maintaining situational awareness, adhering to air traffic control instructions, and responding promptly to any changes or emergencies that may arise during the flight.

Moreover, the RCH’s role in controlling the ELT is also crucial for the safety of the aircraft and its occupants. In the event of an emergency, such as a forced landing or a crash, the ELT automatically transmits distress signals that assist search and rescue teams in locating the aircraft. The RCH allows pilots to activate the ELT manually, ensuring that rescue operations can be initiated promptly, potentially saving lives.

Furthermore, the RCH’s design and placement prioritize ease of use and accessibility for the pilots. With its location on the center pedestal, pilots can easily reach and manipulate the RCH without significant distraction or interference with other flight controls. This allows for quick and seamless radio operations, minimizing the pilots’ workload and enabling them to focus on other critical aspects of flying the aircraft.


The small unit of measurement, RCH, on the Airbus A330 is an essential component that enables pilots to control and manage the aircraft’s radio functions. From tuning VHF frequencies to activating the Emergency Locator Transmitter (ELT), the RCH plays a crucial role in ensuring effective communication and enhancing safety during flight operations.

By understanding the significance of the RCH and its role in the cockpit, pilots can make the most of this small unit of measurement to establish clear communication channels, respond to air traffic control instructions promptly, and ensure their own safety, as well as that of the passengers and crew on board.

For More: What is TOW on Airbus A330? (Takeoff Weight)