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Backup mode is lost.
PRIMARY AND SECONDARY CHANNEL FAILURE
Optimized and backup temperature regulation is lost.
The packs deliver a fixed temperature : 20~C (68~F) for pack 1, 10~C (50~F) for pack 2. The
failure removes all information from the ECAM COND page, which then displays PACK REG.
PACK CONTROLLERS
PRIMARY CHANNEL FAILURE
The secondary computer operates as a backup
Regulation is not optimized.
Pack flow is fixed at the previous setting.
SECONDARY CHANNEL FAILURE
This failure has no effect on pack regulation. Backup mode is lost
ECAM signals related to the corresponding pack are lost.
┏━━━━━━━━━━━━━━━━┳━━━━━━━━━━┳━━━━━━━━━━━┓
┃I -~ A318 ┃AIR COND/PRESS/VENT ┃1.21.10 P g ┃
┃ .*,,.8, ,, ~L,~ A319 ┃ ┃ ┃
┃ ┃ ┣━━━━━┳━━━━━┫
┃ Lii,~ A320 ┃ ┃SEQ 100 I ┃I REV 34 ┃
┃ A~7-~'M" A321 ┃ AIR CONDITIONING ┃ ┃ ┃
┃ FLIGHT CREW OPERATING MANUAL ┃ ┃ ┃ ┃
┗━━━━━━━━━━━━━━━━┻━━━━━━━━━━┻━━━━━┻━━━━━┛
PRIMARY AND SECONDARY CHANNEL FAILURE
As a backup, corresponding pack outlet temperature is controlled by the anti-ice valve and
is stabilized to a temperature between 5~C (41~F) and 30~C (86~F) in a maximum of 6
minutes.
ECAM signals, related to the corresponding pack, are lost.
AIR CYCLE MACHINE FAILURE
If the Air Cycle Machine (ACM) fails (compressor/turbine seizure), the affected pack may
be operated in heat exchanger cooling mode.
Warm pre-conditioned bleed air enters the cooling path via the pack valve, and goes to the
primary heat exchanger. Then, the main part of the cooled air goes directly downstream of
the ACM turbine through the bypass valve, and the rest goes through the failed ACM.
The ACM seizure reduces the pack flow.
As for normal pack operation :
- The pack controller regulates temperature, in accordance with zone controller demand,
by modulating the bypass valve and the ram air inlet flap.
- The zone controller regulates the hot air flow through the trim air valves to optimize
cockpit/cabin temperature regulation. Hot air flow is lower than in normal pack
operation, because pack flow is reduced.
HOT AIR PRESSURE REGULATING VALVE FAILURE
Failed open : No effect.
Failed closed : Optimized regulation is lost. Trim air valves are driven to the full closed
position. Pack 1 controls the cockpit temperature to the selected value,
and pack 2 controls the cabin temperature (FWD and AFT) to the mean
value, of the selected temperatures.
TRIM AIR VALVE FAILURE
Optimized temperature regulation of the corresponding zone is lost
CCM ALL
┏━━━━━━━━━━━━━━━━┳━━━━━━━━━━━━━━━┳━━━━━━━━━━━┓
┃ ┃ ┃1.21.10 P 10 ┃
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本文链接地址：
AIRBUS A320 Flight Crew Operating Manual1(94)
