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OVERSPEED GOVERNOR SYSTEM
Independent of the FADEC, the overspeed
bypass valve, in the event of a malfunction
IDLE CONTROL
governor limits the N2 by opening the fue
that could lead to an overspeed condition.
The FADEC has the following three idle modes
Modulated idle
s regulated according to
bleed system demand
s selected ~
In flight, when the flaps are retracted (FLAPS lever at zero position),
On ground, provided reverse is not selected.
Approach idle :
- Is regulated according to aircraft altitude, regardless of bleed system demand.
- Is selected in flight, when the flaps are extended (FLAPS lever not at zero position)
- Allows the engine to accelerate rapidly from idle to go-around thrust
Reverse idle
s selected on ground, when the thrust lever is in REV IDLE position
s slightly higher than forward idle thrust.
CCM ALL
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┃                                ┃                            ┃1.70.40     P 4       ┃
┃                                ┃                            ┣━━━━━┳━━━━━┫
┃I  ~-L A318                     ┃l         POWERFUELNSYSTEM  ┃SEQ 005 1 ┃I REV 23  ┃
┃ aw aw ,, ~L,~ A319             ┃                            ┃          ┃          ┃
┃ Lli,~ A320                     ┃                            ┃          ┃          ┃
┃      A~7-~'M" A321             ┃                            ┃          ┃          ┃
┃   FLIGHT CREW OPERATING MANUAL ┃                            ┃          ┃          ┃
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FUEL HYDRAULIC SIGNALS
Fuel hydraulic signals go to ~
- Low Pressure Turbine Clearance Control (LPTCC) valves
(Refer to I. 70. 60)
High Pressure Turbine Clearance Control (HPTCC) valves
(Refer to I. 70. 60)
Rotor Active Clearance Control (RACC) system
(Refer to I. 70. 60)
Variable Stator Vanes (VSV)
The VSV system positions the compressor variable vanes.
The FAOEC maintains optimum compressor efficiency at a steady state and an adequate
stall margin for transient engine operation.
VSVs are fully closed during engine start and are fully open at high thrust.
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┃  ┃  ┃                   FUEL    I      ,,0,, ┃
　
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本文鏈接地址：AIRBUS A320 Flight Crew Operating Manual5(162)