What is C/L on Airbus A320? (Checklist)

The Checklist, abbreviated as C/L, is an essential tool used in aviation to ensure the safety and efficiency of aircraft operations. The Airbus A320, a widely used commercial aircraft, is no exception. The Checklist on the Airbus A320 plays a crucial role in the pre-flight, in-flight, and post-flight procedures, guiding pilots through a series of critical tasks and checks. In this article, we will explore the significance of the Checklist on the Airbus A320 and its importance in maintaining the highest standards of aviation safety.

Understanding the Checklist on Airbus A320

The Checklist on the Airbus A320 can be categorized into three main sections: pre-flight, in-flight, and post-flight. Each section deals with specific tasks and checks that must be completed before, during, and after a flight. These checklists are meticulously designed to cover all vital aspects of the aircraft’s systems and operations, ensuring that no step is overlooked or forgotten.

Pre-Flight Checklist

The pre-flight Checklist on the Airbus A320 is carried out prior to each flight and involves a comprehensive set of checks to ensure the aircraft is in an airworthy condition. This Checklist is vital in identifying any potential issues or malfunctions that could jeopardize the safety of the flight. Some of the key tasks covered in the pre-flight Checklist include:

1. Exterior inspection: Pilots visually inspect the aircraft’s exterior for any signs of damage, leaks, or abnormalities. This includes checking the wings, fuselage, engines, landing gear, and control surfaces.

2. Cockpit preparation: Pilots verify that all necessary documents, charts, and manuals are on board and up to date. They also ensure that the cockpit instruments and systems are functioning correctly, including the primary flight displays, navigation systems, communication systems, and autopilot.

3. Fuel and weight checks: Pilots calculate the aircraft’s weight and balance to ensure it falls within safe limits. They also verify the fuel quantity and ensure it is sufficient for the planned flight.

Completing the pre-flight Checklist is crucial to identify any potential issues, ensuring that the aircraft is in an optimal state for flight. By adhering to this comprehensive set of checks, pilots can minimize the risk of in-flight emergencies and enhance the overall safety of the aircraft.

In-Flight Checklist

The in-flight Checklist on the Airbus A320 is an ongoing process that pilots follow throughout the duration of the flight. It includes regular checks and procedures to monitor the aircraft’s systems, manage fuel consumption, and handle any emergencies that may arise. Here are some of the key tasks covered in the in-flight Checklist:

1. Systems monitoring: Pilots continuously monitor the aircraft’s systems, including engines, flight controls, electrical systems, and hydraulics. This involves checking various parameters, such as engine temperatures, airspeed, altitude, and fuel levels, to ensure everything is operating within normal limits.

2. Fuel management: Pilots monitor the fuel consumption and ensure it aligns with the planned fuel burn. They also keep track of fuel levels and calculate the aircraft’s endurance, considering factors such as headwinds or tailwinds.

3. Emergency procedures: The in-flight Checklist includes specific procedures for handling different types of emergencies, such as engine failures, loss of pressurization, or fire. Pilots are trained to follow these procedures to ensure the safety of the passengers, crew, and the aircraft.

By diligently following the in-flight Checklist, pilots can effectively manage the systems on the Airbus A320 and respond promptly to any abnormal situations that may occur during the flight.

Post-Flight Checklist

The post-flight Checklist on the Airbus A320 is conducted after each flight and involves a series of tasks to ensure the proper shutdown and maintenance of the aircraft. This Checklist ensures that all systems are shut down correctly and any issues that occurred during the flight are properly addressed. Here are some of the key tasks covered in the post-flight Checklist:

1. Systems shutdown: Pilots follow specific procedures to shut down various systems on the aircraft, including the engines, electrical systems, and avionics. This ensures that all systems are powered down safely and minimize the risk of any post-flight malfunctions.

2. Documentation: Pilots complete various paperwork, including the flight log, maintenance reports, and any incident reports if necessary. This documentation is essential for record-keeping and maintenance purposes.

3. Aircraft walkaround: After the flight, pilots conduct a final walkaround to visually inspect the aircraft for any signs of damage or abnormalities that may have occurred during the flight. This includes checking the landing gear, exterior surfaces, and engine areas.

The post-flight Checklist ensures that any issues or malfunctions that occurred during the flight are properly addressed and reported. It also prepares the aircraft for the next flight by ensuring all systems are shut down correctly and the appropriate maintenance actions are taken if required.


The Checklist on the Airbus A320 is a vital tool that keeps pilots focused, organized, and efficient in their tasks. It plays a crucial role in maintaining aviation safety by guiding pilots through a series of checks and procedures before, during, and after each flight. By adhering to the Checklist, pilots can identify any potential issues, respond effectively to emergencies, and ensure the overall well-being of the aircraft and its occupants.

For More: What is LL on Airbus A320? (Latitude/Longitude)