DOC AIRBUS | AMM A320FCOMPRESSOR CONTROL - DESCRIPTION AND OPERATION
** ON A/C NOT FOR ALL
1. General
The High Pressure Compressor (HPC) controls include the systems that follow:
These systems are controlled by the Electronic Engine Control (EEC) to give optimum engine performance for all engine operating conditions.
** ON A/C NOT FOR ALL The High Pressure Compressor (HPC) controls include the systems that follow:
- The Variable Bleed Valve (VBV) system
- The Variable Stator Vane (VSV) system
- The Transient Bleed Valve (TBV) system.
These systems are controlled by the Electronic Engine Control (EEC) to give optimum engine performance for all engine operating conditions.
2. System Description
A. Variable Stator Vane (VSV) System
The VSV system controls the amount of airflow through the HPC to provide optimum compressor performance at steady state conditions and to prevent compressor stall during engine acceleration and deceleration including engine start and engine shutdown (Ref. AMM D/O 75-32-00-00).
The VSV system controls the amount of airflow through the HPC to provide optimum compressor performance at steady state conditions and to prevent compressor stall during engine acceleration and deceleration including engine start and engine shutdown (Ref. AMM D/O 75-32-00-00).
B. Transient Bleed Valve (TBV) System
The TBV system gives additional HPC engine operability margin. The TBV is normally closed (no 10th stage HPC bleed) and will open (10th stage HPC bleed) during engine decelerations as the HPC requires additional operability margin (Ref. AMM D/O 75-33-00-00).
The TBV system gives additional HPC engine operability margin. The TBV is normally closed (no 10th stage HPC bleed) and will open (10th stage HPC bleed) during engine decelerations as the HPC requires additional operability margin (Ref. AMM D/O 75-33-00-00).