Airbus A318/A319/A320/A321 Air Conditioning Maintenance Manual – AMM Chapter 21

Description

File Details

• Manual Type: Aircraft Maintenance Manual (AMM) Chapter 21
• Applicable Aircraft: Airbus A318, A319, A320, A321
• Language: English
• Page Count: Approximately 1909 pages
• File Format: PDF
• Document Number: AES
• Revision: 40
• Date: May 01/12

This comprehensive chapter of the Airbus AMM provides all the detailed technical information, diagrams, and procedures required for the maintenance, testing, and troubleshooting of the entire air conditioning system on A318, A319, A320, and A321 aircraft.

Chapters Covered

The manual is organized into the following major sections, which are further broken down into detailed tasks and procedures:

• 21-00-00 AIR CONDITIONING – GENERAL: System description, operation, control and indicating, BITE test, and general maintenance practices including decontamination procedures for the Environmental Control System (ECS).
• 21-20-00 DISTRIBUTION: Removal/installation of distribution ducts, and inspection of riser ducts and lavatory/galley ventilation ducting.
• 21-21-00 AIR DISTRIBUTION AND RECIRCULATION: Component location, system description, operational tests for recirculation fans and individual air outlets. Covers recirculation filters, check valves, and the mixer unit.
• 21-23-00 LAVATORY/GALLEY VENTILATION: Description, component location, servicing (replacement of extraction filter), deactivation/reactivation, and functional tests.
• 21-24-00 INDIVIDUAL AIR DISTRIBUTION: Description, repair of individual air outlets, and removal/installation of the outlets.
• 21-26-00 AVIONICS EQUIPMENT VENTILATION: Full system description, component location, operation, BITE tests, maintenance practices, deactivation/reactivation of valves and fans, and extensive adjustment/test procedures.
• 21-28-00 CARGO COMPARTMENT VENTILATION: Description, component location, deactivation/reactivation, functional and operational tests, plus removal/installation of the ventilation controller, isolation valves, and extraction fan.
• 21-31-00 PRESSURE CONTROL AND MONITORING: Detailed system description, component location, operation, BITE test, servicing, deactivation/reactivation, adjustment/test, cleaning, and removal/installation of controllers, outflow valve, and safety valves.
• 21-43-00 CARGO COMPARTMENT HEATING: Description, component location, system description, BITE test, deactivation/reactivation, adjustment/test, cleaning, and removal/installation of sensors, selector, controller, and valves.
• 21-51-00 FLOW CONTROL AND INDICATING: Description, component location, system description, operation, BITE test, deactivation/reactivation, adjustment/test, inspection/check, repairs, and removal/installation of sensors, filters, and valves.
• 21-52-00 AIR COOLING SYSTEM: Full system description, component location, operation, BITE test, servicing, deactivation/reactivation, extensive adjustment/tests, inspection/check, cleaning/painting, repairs, and removal/installation of the air cycle machine, heat exchangers, condenser, water extractor, and other pack components.
• 21-55-00 EMERGENCY RAM AIR INLET: Description, component location, system description, operation, deactivation/reactivation, adjustment/test, and removal/installation of the actuator and check valve.
• 21-61-00 PACK TEMPERATURE CONTROL: Description, component location, system description, operation, BITE test, deactivation/reactivation, adjustment/test, repairs, and removal/installation of pack controllers, sensors, and valves.
• 21-63-00 COCKPIT AND CABIN TEMPERATURE CONTROL: Description, component location, system description, operation, BITE test, servicing, deactivation/reactivation, adjustment/test, and removal/installation of temperature selectors, sensors, and valves.

This manual equips a technician with everything needed to diagnose and repair complex issues such as pack malfunctions, pressurization faults, temperature control failures, and avionics cooling problems. It provides the correct torques, pressures, temperatures, and test procedures directly from the manufacturer, ensuring safe and airworthy repairs.

This is an essential resource for any aircraft maintenance engineer or organization responsible for the upkeep of the A320 family. The information is presented in a clear, task-oriented format, with precise steps for every job, from simple visual inspections to the removal and installation of major components like the air cycle machine.

Why You Need This Manual

Working on modern aircraft systems requires absolute precision and adherence to approved data. Using this official Airbus manual ensures you have the correct specifications, test values, and maintenance practices as defined by the aircraft manufacturer. This significantly reduces the risk of error, ensures the safety of the aircraft and its occupants, and supports compliance with aviation regulations. Whether you are performing routine servicing, troubleshooting a fault, or carrying out a major component change, this manual is your definitive guide.

This is a digital, PDF version of the manual. Upon purchase, you will receive an instant download link, allowing you to access the information immediately on your computer, tablet, or mobile device. The PDF is printable, searchable, and can be used on any device with a PDF reader.