Bleed system (AMS)

Question 1

What is Bleed Air used for?

Answer 1

Engine starting, Air conditioning, heating, anti ice, pressurization, water pressure, Hot air leak detection.

Question 2

Where does Pack 1 distribute air to?

Answer 2

Flight Deck and Cabin

Question 3

Where does Pack 2 distribute Air to?

Answer 3

Cabin

Question 4

How many fans in aft Electronics bay (Ebay)

Answer 4

zero

Question 5

How many packs are on the Aircraft?

Answer 5

2

Question 6

what provides air to the packs?

Answer 6

Bleed Air

Question 7

Does pack 1 normally get its air from bleed 1 or 2?

Answer 7

Bleed 1 (unless crossBLEED then it uses 2)

Question 8

Can a single pack provide adequate temperature and pressurization?

Answer 8

yes, up to 31000 ft

Question 9

how many recirculation fans?

Answer 9

2

Question 10

Pushing out the RECIRC button does what?

Answer 10

Stops BOTH RECIRC Fans

Question 11

How would an APU bleed button, or Bleed show a leak?

Answer 11

Amber light Illuminates on Button

Question 12

where is air for bleed Tapped from?

Answer 12

6th and 10th stage compressors

Question 13

How many Bleed valves on each engine?

Answer 13

2 (high speed 10th stage) (low speed 6th)

Question 14

What does pushing out pack 1 putton?

Answer 14

closes pack 1 valve

Question 15

Which cargo bay has air circulation

Answer 15

FWD cargo bay

Question 16

Can pressurization outflow valve be modulated manually?

Answer 16

yes

Question 17

What Happens when the Dump Button is pressed on the Pressurization panel?

Answer 17

Turns both recirc fans and Packs OFF
Cabin decompresses at a rate of 2000 ft per minute until 12,400 ft. Both packs are deactivated.

Question 18

what are some of the items on the pressurization system?

Answer 18

Cabin pressure controller (CPC)
Outflow Valve
positive pressure relief valve
negative pressure relief valve
static pressure port

Question 19

How many channels does the pressure controller have?

Answer 19

2 fully independent automatic channels, that Alternate each flight.

Question 20

how do you set landing field elevation for pressurization?

Answer 20

Its set in the FMS from the Nav data base when you select a destination.

Question 21

When might the “Dump” Function be used?

Answer 21

Emergency Evacuation procedure

Question 22

If you look at EICAS screen for landing field elevation and its color is Cyan what does that mean?

Answer 22

Manual LFE set

Question 23

T/F the cruise altitude automatically updates if cruise altitude changes in fight

Answer 23

FALSE

Question 24

Will dump function work in manual mode?

Answer 24

NO, however the packs and recirc fans will be commanded OFF