What is ISIS on Airbus A320? (Integrated Standby Instrument System)

The Integrated Standby Instrument System (ISIS) on the Airbus A320 is a critical component of the aircraft’s flight display system. It provides pilots with essential flight information in the event of a failure or loss of primary flight instruments. The ISIS serves as a backup, ensuring that pilots can safely navigate and control the aircraft even in adverse situations.

The ISIS consists of two main units: the Electronic Standby Instrument (ESI) and the Control Panel Unit (CPU). The ESI is a standalone display that provides pilots with primary flight, navigation, and engine data. It is designed to be easily readable even in low light conditions, ensuring that pilots have access to critical information at all times.

The CPU, on the other hand, acts as the interface between the aircraft’s avionics system and the ESI. It receives data from various sensors and systems and processes it to provide accurate and real-time information to the ESI. The CPU also includes buttons and knobs that allow pilots to control and configure the ISIS system.

The ISIS is installed in the cockpit, usually on the center instrument panel. It is positioned within easy reach of both pilots, ensuring quick and convenient access to critical flight information. The system is designed to be highly reliable and capable of operating autonomously for extended periods, even during electrical power interruptions.

During normal flight operations, the ISIS remains in standby mode, displaying basic flight parameters such as attitude, airspeed, altitude, and vertical speed. It continuously monitors the status of the primary flight instruments and avionics systems, ready to take over in case of a failure or loss of data.

Advantages of the Integrated Standby Instrument System

The ISIS offers several advantages that contribute to the safe operation of the Airbus A320 aircraft:

1. Redundancy: The ISIS provides redundancy for critical flight information. In the event of a failure or loss of data from the primary flight instruments, the ISIS takes over and ensures that pilots have access to essential flight parameters. This redundancy significantly enhances the safety of the aircraft.

2. Improved Situational Awareness: The ISIS enhances situational awareness by continuously displaying critical flight information. Pilots can quickly reference the display to assess the aircraft’s status and make informed decisions. The clear and concise presentation of data on the ESI ensures that pilots can interpret the information accurately and efficiently.

3. Easy Integration: The ISIS is seamlessly integrated into the Airbus A320’s flight display system. It can interface with other avionics systems and sensors to receive and process data. The CPU allows pilots to configure the system, ensuring that it meets their specific needs and preferences.

4. Rapid Recovery: In the event of a failure, the ISIS automatically takes over and displays the necessary flight information. This rapid recovery minimizes the time and effort required for pilots to regain control of the aircraft, allowing them to focus on safely managing the situation.

The Importance of Integrated Standby Instrument System on Airbus A320

The ISIS plays a crucial role in maintaining the safety and reliability of the Airbus A320 aircraft. It serves as a backup system, ensuring that pilots have access to essential flight information even in the case of a failure in the primary flight instruments or avionics systems.

The ISIS is designed to be highly reliable, capable of operating autonomously for extended periods. This ensures that pilots can confidently rely on the system to provide accurate and up-to-date information, even in challenging situations.

With the ISIS, pilots can quickly assess the aircraft’s attitude, airspeed, altitude, and vertical speed. This information is crucial for maintaining control and making informed decisions during flight. The clear and intuitive display of the ESI facilitates easy interpretation of the data.

The ISIS also enhances situational awareness by providing pilots with real-time updates on critical flight parameters. This allows them to promptly detect any deviations from the desired flight path and take corrective actions as necessary.

Furthermore, the ISIS offers a seamless integration into the Airbus A320’s avionics system. It can communicate with other systems and sensors, ensuring that pilots have access to comprehensive and accurate data. The system can also be customized to meet the specific needs and preferences of each pilot.

For More: What is VMIN on Airbus A320? (Minimum Operating Speed)