AIR COND panel

Question 1

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?

Answer 1

HIGH flow rate, since the flow rate function is automatic

Question 2

If the HOT AIR valve faults, what will happen to the temperature control system?

Answer 2

All trim air valves close and PACK 1 controls the cockpit temperature to the last selected value. PACK 2 controls the cabin to the averages selected by the FWD and AFT CABIN temperature selector knobs.

Question 3

How are the PACKS controlled and operated?

Answer 3

Electrically controlled and pneumatically operated.

Question 4

What are some potential causes for a PACK FAULT light?

Answer 4

• Valve position disagrees with selected
• Compressor outlet overheat
• Pack outlet overheat

Question 5

What are some potential causes for ENG BLEED FAULT light?

Answer 5

• bleed over pressure
• bleed overheat
• wing or engine leak on the related side
• Bleed valve NOT closed during engine start
• Bleed valve NOT closed with the APU BLEED ON

Question 6

What is the logic for the X-BLEED rotary selector?

Answer 6

• SHUT= the valve is closed
• AUTO= open if the APU bleed valve open; closed if the APU bleed valve is closed or there is a wing, pylon, or APU leak (except during an engine start).
  OPEN = the valve is open

Question 7

What does APU BLEED FAULT illumination indicate?

Answer 7

APU bleed leak

Question 8

What does selecting the RAM AIR push button accomplish?

Answer 8

Ram air inlet opens if the differential pressure is less than 1 PSI.

Question 9

What does selecting the RAM AIR Pushbutton used for?

Answer 9

• Smoke removal in cabin

- ventilation of cabin with dual pack failure

Question 10

How is the Bleed leak detection different on the CEO and NEO aircraft?

Answer 10

If a bleed air monitoring computer (BMC) fails on NEO airplane, over temperature protection is lost on the affected side. Has no affect on CEO.