AIR COND Panel (Rev. 3) Flashcards
If PACK FLOW is selected to LO, NORM, or HIGH and only the APU is providing BLEED AIR or one pack is selected OFF, what will the packs provide?
HIGH flow rate, since the flow rate function is automatic
If the HOT AIR valve faults, what will happen to the temperature control system?
All trim air valves close and PACK 1 controls the cockpit temperature to the selected value. PACK 2 controls the cabin to the averages selected by the FWD and AFT CABIN temperature selector knobs
How are the PACKS controlled and operated?
Electrically controlled and pneumatically operated
What are some potential causes for a PACK FAULT light?
- Pack outlet overheat
- Compressor outlet overheat
- Switch position disagree with pack flow valve position
What are some potential causes for ENG BLEED FAULT light?
- E: Excessive pneumatic temperature or pressure
- W: Wing or engine leak on the related side
- D: Disagree between APU and Eng bleed valve
What is the logic for the X-BLEED rotary selector?
- SHUT = the valve is closed
- AUTO = open if the APU bleed valve is open; closed if the APU bleed valve is closed or there is a wing, pylon or APU leak (except during engine start)
- OPEN = the valve is open
What does APU BLEED FAULT illumination indicate?
APU bleed leak
What does selecting the RAM AIR pb accomplish?
Ram air inlet opens if the differential pressure is less than 1 PSI
What is the RAM AIR pb used for?
- Smoke/fumes removal in cabin
- Ventilation of cabin with a dual pack failure
How is the bleed leak detection different on CEO and NEO A/C?
If a bleed air monitoring computer (BMC) fails on NEO A/C, over temperature protection is lost on the affected side. Has no effect on CEO.
When should you select LO pack flow?
- A319: pax < 138
- A320: pax < 141
- A321: select ECON FLOW when pax < 168
