Engine Bleed System

General

The aircraft has two similar engine bleed air systems. Each system is designed to:

  • select the compressor stage to use as a source of air
  • regulate the bleed air temperature
  • regulate the bleed air pressure.

A Bleed Monitoring Computer (BMC) controls and monitors each system. Each BMC receives information about bleed pressure and temperature and valve position and is connected with :

  • other systems using air or information from the bleed system
  • the other BMC.

Each supplies indications and warnings to the ECAM and CFDS. If one BMC fails, the other one takes over most of the monitoring functions. Each bleed valve is pneumatically operated and controlled electrically by its associated BMC.

Schematic

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