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The air distribution system supplies air conditioning to the flight deck is from:
The trim air pressure regulator valve controls:
The alternate ventilation system (AVS) lets:
The upper recirculation fan functions is:
The trim air is from：
Purpose of zone duct temperature sensors is：
Purpose of humidifier shutoff valve is：
The temperature control system is a system for adjustment and control of temperatures in each zone of ：
Purpose of the upper recirculation heat exchanger (URHX) is:(787-9)
Purpose of the flight deck shoulder duct heaters are:
Size of flow control orifices holes in air conditioning distribution supply duct:
The flight deck air supply boost fan operates for any of these conditions:：
The following description abuot the zone duct temperature sensor ,which is right?
Which condition does AVS(Alternate Ventilation System) operate?
When the AVS of 787-9 operates,which component will be operated
AVS(Alternate Ventilation System) is controlled by:
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