AMS: Pneumatic Supply

Question 1

Under what condition does the XBLEED valve open with the XBLEED switch in AUTO

Answer 1

Loss of bleed air from one engine

Question 2

With Engine 2 started first, SAT >30C, what is the position of the following valves after both engines are running:

PRSOV 1 AND 2
XBLEED
FCSOV (ECS) 1 AND 2

Answer 2

All are closed

Question 3

After both engines start, and the PRSOV, XBLEED and FCSOV valves are closed, how is fresh air supplied to the cabin?

Answer 3

Line from the condenser area allows ambient air to bypass the Ram Air Valve into overhead manifold

Question 4

After both engines start, and the PRSOV, XBLEED and FCSOV valves are closed, when are both PRSOVs and FCSOVs (ECS) forced to open?

Answer 4

TOGA Power

Question 5

With Engine 2 started first, SAT is between 11C and 30C, what is the position of the following valves after both engines are running:

PRSOV 1 AND 2
XBLEED
FCSOV (ECS) 1 AND 2

Answer 5

PRSOV 1: Closed
All others are open

Question 6

With Engine 2 started first, SAT is between 11C and 30C, PRSOV 1 is closed, PRSOV 2, XBLEED and FCSOV 1 and 2 are open. When will PRSOV1 be forced open and XBLEED closed?

Answer 6

TOGA Power

Question 7

With Engine 2 started first, SAT is below 8C, what is the position of the following valves after both engines are running:

PRSOV 1 AND 2
XBLEED
FCSOV (ECS) 1 AND 2

Answer 7

XBLEED is closed
All others are open.

Question 8

Where are the cockpit indication that one or both PRSOVs is closed?

Answer 8

1) CAS (Advisory): BLEED 1(2) OFF
2) ECS Synoptic Page
3) Ice Protection Synoptic Page

Question 9

Where is the cockpit indication of the XBLEED position?

Answer 9

1) ECS Synoptic Page
2) Ice Protection Synoptic Page

Question 10

What occurs when the ECS switch is moved to the 1 or 2 position

Answer 10

1) Opposite side FCSOV (ECS) Valve closes

Question 11

Describe the Control, Activation and Fail Position of the following valves:

PRSOV (Pressure Regulating Shutoff Valves)
XBLEED (Cross Bleed Valve)
FAVs (Fan Air Valves)
WHSAIVs (Wing Horizontal Stab Anti Ice Valve)
EAIVs (Engine Anti Icing Valves)
FCSOVs/ ECS (Flow Control Shutoff Valves)
TMVs (Temp Modulating Valves.

Answer 11

1) All Valves are electrically controlled

2)PRSOVs, XBLEED, FAVs, WHSAIVs, and EAIVs a pneumatically activated. FCSOVs, TMVs, are Electrically activated

3) PRSOVs, XBLEED, and WHSAIVs Fail in the closed position
FAVs, and EAIVs, fail in the Open position
FCSOVs and TMVs - Fail Last