Bleed Air Panel

Question 1

ISLN SWITCH L/C/R
Auto

Answer 1

Automatically controls bleed isolation valve

Question 2

ISLN SWITCH L/C/R
CLOSED

Answer 2

AMBER
1.Closed due to duct leak or bleed loss
2.Valve failed to close
3.Respective ISLN switch off

Question 3

L/R ENG BLEED SWITCHES
AUTO

Answer 3

Opens engine bleed valve when bleed air available.

Question 4

L/R ENG BLEED SWITCHES
OFF

Answer 4

(AMBER)
1.Engine not running
2.Bleed air overheat / over Pressure or control system failure.
3.Valve failed closed
4.ENG Fire switch pulled
5.L Eng bleed valve closed during APU to Pack T/O procedure
6.Switch pressed OFF

Question 5

APU BLEED SWITCH
AUTO

Answer 5

1.Opens APU bleed by system logic when bleed air available.

Question 6

APU BLEED SWITCH
Off

Answer 6

Closes Valve
1. Closed due to duct leak
2. Due to valve failed closed.
3. APU Fire switch Pulled