Pneumatic

Question 1

4 pneumatic sources of power.

Answer 1

-Engine 1 bleed air system
-Engine 2 bleed air system
-APU
-Pneumatic ground air connection

Question 2

________ bleed air comes from the 4th and 10th stages of high pressure compressor.

Answer 2

Engine

Question 2

A _______ ________ ________ controls the 10th stage bleed air.

controlled by the (ASC) in the IASC.

Spring-loaded closed with the loss of electrical and Pneumatic power.

Answer 2

high pressure shutoff valve (HPSOV)

HP is 10th stage

Question 2

An _______ _______ ________ prevents reverse flow into the 4th stage.

Answer 2

intermediate Pressure Check Valve (IPCV)

LP is 4th stage

Question 3

_____ valves are spring loaded and electrically controlled.

Answer 3

PNU

Question 4

_______ digitally controls the output of 4th and 10th stage pneumatic air in response to bleed system demands;

Answer 4

IASC (Integrated Air System Cooler)

Question 5

The enable and disable coils on PRSOV solenoid valve are ______ ______ coils. When there is a loss of electric power, the solenoid valve stays in the last position given by an electrical command.

Answer 5

constant duty

Question 6

If precooler outlet temperature reaches 400F (227C), the PRSOV will _____ bleed air flow (temperature topping).

The PRSOV commanded closed when precooler exit temperature reached 490F for 20s.

Answer 6

restrict

Question 7

What is FAMV (Fan Air Modulating Valve)?

Answer 7

Butterfly valve that is spring loaded to the open pstn