DOC AIRBUS | AMM A320FAIR - GENERAL - DESCRIPTION AND OPERATION
** ON A/C NOT FOR ALL
1. General
A. General
(1) The air system is used to improve engine operability and stability by bleeding air from the Low Pressure Compressor (LPC) and the High Pressure Compressor (HPC).
(2) The air system also removes dirt, water, and hail from the LPC air stream and prevents the debris from entering the HPC.
(3) The air system supplies the necessary cooling airflow to keep the temperature of the engine compartments in limits.
(4) The air system increases compressor stability during starting, transient, and reverser thrust operation.
(5) The air system consists of the engine cooling system and the compressor control system.
B. Component Location
| FIN | FUNCTIONAL DESIGNATION | PANEL | ZONE | ACCESS DOOR | ATA REF |
|---|---|---|---|---|---|
| ** ON A/C NOT FOR ALL | |||||
| 4008KS | SENSOR-TEMP, CORE AIR | 400 | 75-41-11 | ||
| 4052KS | PRIMARY ACTUATOR-HPC STATOR VANE | 400 | 73-21-68 | ||
| 4053KS | ACTUATOR - HPC STATOR VANE, SECONDARY | 400 | 73-11-00 | ||
| 4054KS | ACTUATOR - LPC STATOR VANE | 400 | 73-11-00 | ||
| 4055KS | TURBINE ACC AIR VALVE | 400 | 73-11-00 | ||
| 4056KS | BUFFER AIR VALVE SOLENOID | 400 | 73-11-03 | ||
| 4057KS | BUFFER AIR VALVE PRESSURE SENSOR | 400 | 73-11-00 | ||
| 4058KS | HPC BLEED VALVE AIR PRESSURE SENSOR | 400 | 73-11-00 | ||
| 4092KS | ACTUATOR-LPC BLEED VALVE | 400 | 73-11-00 | ||
| 4183KS | CTL SOLENOID BLEED VALVE ACTIVE - HPC | 400 | 75-32-52 | ||
| 4184KS | SENSOR-AIR PRESSURE, HPC BLEED VALVE | 400 | 75-32-52 | ||
| 4100JM | BUFFER AIR HEAT EXCHANGER | 400 | 73-11-00 | ||
| 4101JM | VALVE-BUFFER AIR | 400 | 75-32-52 | ||
| 4102JM | HPC BLEED VALVE | 400 | 73-11-00 | ||
| 4103JM | BLEED VALVE ACTIVE - HPC | 400 | 75-32-52 | ||
(1) The core temperature sensor is attached to the fuel/oil manifold located at the six O'clock engine position.
(2) The HPC Stator Vane Actuator (SVA) primary unit is mounted on the HPC case at approximately the two O'clock engine position.
(3) The HPC SVA secondary unit is attached to the HPC and mounted on the HPC case located at the seven O'clock engine position.
(4) The LPC SVA is located at approximately the nine O'clock position.
(5) The turbine Active Clearance Control (ACC) air valve is located on the diffuser case at the one O'clock position.
(6) The buffer air valve solenoid is located on the Compressor Intermediate Case (CIC) at approximately the four O'clock position.
(7) The buffer air valve pressure sensor is attached to the CIC firewall at the three O'clock position.
(8) The HPC bleed valve air pressure sensor is attached to the CIC firewall at approximately the nine O'clock position.
(9) The HPC bleed valve (active) air pressure sensor is attached to the CIC firewall at the two O'clock engine position.
(10) The LPC 2.5 bleed valve actuator is mounted at the rear of the CIC fire seal at approximately the ten O'clock position.
(11) The HPC bleed valve solenoid is attached to the HPC case at approximately the 12 O'clock position.
(12) The buffer air heat exchanger is mounted on brackets attached to the diffuser case at the 11 O'clock position.
(13) The buffer air valve is located on the HPC at approximately the two O'clock position.
(14) The HPC bleed valve (passive) is attached to the diffuser case at the one O'clock position.
(15) The HPC bleed valve (active) is located on the diffuser case at approximately the three O'clock position.