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┃I  -~ A318                      ┃I         APU  DESCRIPTION  ┃SEQ 001 1 ┃I REV 23  ┃
┃  .,,,.8, ,, ~L,~ A319          ┃                            ┃          ┃          ┃
┃ Lli,~ A320                     ┃                            ┃          ┃          ┃
┃      A~7-~'M" A321             ┃                            ┃          ┃          ┃
┃   FLIGHT CREW OPERATING MANUAL ┃                            ┃          ┃          ┃
┗━━━━━━━━━━━━━━━━┻━━━━━━━━━━━━━━┻━━━━━┻━━━━━┛
APU ENGINE
The basic element of the APU is a single-shaft gas turbine that delivers mechanical shaft
power for driving the accessory gearbox (electrical generator, starter, etc.) and produces
bleed air (engine starting and pneumatic supply).
ELECTRONIC CONTROL BOX
The Electronic Control Box (ECB) is a full-authority digital electronic controller that performs
the bulk of the APU system logic for all modes of engine operation, such as :
- Sequences the start and monitors it.
- Monitors speed and temperature.
- Monitors bleed air.
- Sequences the shutdown.
- Controls the automatic shutdown.
AIR INTAKE SYSTEM
The air intake and an electrically operated flap allow external air to reach the compressor
inlet.
STARTER
The ECB controls the electric starter. The starter engages if the air intake is fully open and
the MASTER SW and the START pushbutton are ON.
FUEL SYSTEM
The left fuel feed line supplies the APU.
The required pressure is normally available from tank pumps.
If pressure is not available (batteries only or pumps off) the APU FUEL PUMP starts
automatically.
The ECB controls the fuel flow.
OIL SYSTEM
The APU has an integral independent lubrication system (for lubrication and cooling)
INLET GUIDE VANES (IGV)
The IGVs control bleed air flow, and a fuel-pressure-powered actuator positions the IGVs
The ECB controls the actuator in response to aircraft demand.
CCM ALL
┏━━━━━━━━━━━━━━━━┳━━━━━━┳━━━━━━━━━━━┓
┃J  -~ A318                      ┃    APU     ┃1.49.10     P 3       ┃
┃  .-,,.8, ,, ~L,~ A319          ┃            ┃                      ┃
┃                                ┃            ┣━━━━━┳━━━━━┫
┃ Lli,~ A320                     ┃            ┃SEQ 100 J ┃J REV 23  ┃
┃      A~7-~'M" A321             ┃DESCRIPTION ┃          ┃          ┃
┃   FLIGHT CREW OPERATING MANUAL ┃            ┃          ┃          ┃
　
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本文鏈接地址：AIRBUS A320 Flight Crew Operating Manual5(51)