900 Pneumatics

Question 1

Wing anti-ice is divided into how many sections?

Answer 1

4

L/R FUSELAGE LOOPS

L/R WING LOOPS

Question 2

How are the leading edges heated

Answer 2

Hot bleed air from the duct is released through piccolo tubes

Question 3

What detects failures in wing anti-ice ducting

Answer 3

Dual loops

And

A skin temperature sensor in wing leading edge

Question 4

Low and high pressure air come from what stages?

Answer 4

6th stage

10th stage

Question 5

What’s manages the distribution of bleed air?

Answer 5

2 ACSCs (Air conditioning system controllers)

Question 6

What does AILC (anti-ice and leak detection controller) do if a leak is detected?

Answer 6

Sends signal to close valves to isolate system

Question 7

When do bleeds transfer from APU to the engines on take off if bleeds closed was needed for takeoff?

Answer 7

Landing gear up AND flaps 20 or less with the thrust levers out of the climb detent.

Question 8

What monitors the bleed system for leaks

Answer 8

AILC anti-ice in leak detection controller

Question 9

Pneumatically operated aircraft systems include:

Answer 9

Engine starting
Cowl and wing anti-ice
Air-conditioning and pressurization

Question 10

The bleed air leak detection system monitors

Answer 10

The pneumatic and anti-ice ducting for high temperatures associated with the bleed air leakage

Question 11

EICAS Messages and system control of the bleed air leak detection system is provided by

Answer 11

AILC

Question 12

Engines supply high or low pressure bleed air depending on

Answer 12

The high pressure valve(HPV)

Question 13

ACSC1 controls?

ACSC2 controls?

Answer 13

1. Left HPV and left engine bleed valve
   APU LCV
   Isolation valve
2. Right HPV and right engine bleed valve

Question 14

PRSOV Is shown in two places

Answer 14

ECS synoptic page

Anti-ice synoptic page

Question 15

Engines supply high or low pressure bleed air depending on

Answer 15

The high pressure valve(HPV)

Question 16

The bleed air manifold is divided into two sections by the?

Answer 16

Isolation valve

Question 17

Bleed valves should fail in the ______ position.

Answer 17

Closed

Question 18

APU LCV is fail safe in the _______ position.

Answer 18

Closed

Question 19

Does manually selecting. The isolation valve open or closed override the systems protective features?

Answer 19

No

Question 20

Where is the bleed air Manifold located

Answer 20

In the engine pylons and aft equipment bay

Divided into two sections by the isolation valve

Question 21

Regarding the bleed air leak detection system how many dual sensing loops must detect a leak before a EICAS messages posted?

Answer 21

Both loops Must detect a leak before a message is posted

Question 22

What is a APU interlock protection

Answer 22

It prevents APU from supplying air

If engine bleed source is open.