Eng and inlet anti ice system

Question 1

purpose of the eng and inlet anti ice system

Answer 1

prevents ice build up on the inlet section

Question 2

components of the eng and inlet anti ice system

Answer 2

anti-ice/start bleed valve
inlet anti ice valve
inlet thermal switch

Question 3

are the solenoid closed or open when electrical power is supplied

Answer 3

closed

Question 4

how to open the anti ice solenoid

Answer 4

turn on anti ice switches or deice master (will only open it as required by the ice detector)

Question 5

three ways to anti ice the engine

Answer 5

vent bleed air into the swirl vanes and inlet guide vanes through the start bleed valve
vent bleed air into the airframe eng inlet through inlet anti ice valve
pump engine oil through the scroll vanes

Question 6

what is the earliest the start bleed valve should close on start

Answer 6

80.5% Ng

Question 7

What is the latest the start bleed valve should close unless eng anti ice is on or there is a loss of electricity

Answer 7

96.5% Ng

Question 8

NEW*** three indications of a malfunctioning anti-ice/ start bleed valve

Answer 8

appearance or disappearance of eng anti ice on outside of rang specified in table
no anti ice on indication when switch is on
no rise in TGT when anti ice switch is on

Question 9

what drives the inlet anti ice on advisory

Answer 9

when the thermal switch on the inlet hits 93 degree

Question 10

freon bellows range

Answer 10

4-13 degrees 13 fully closed 4 fully open

Question 11

do the anti ice switches allow inlet anti ice to turn on

Answer 11

yes, but the freon bellows may restrict air flow

Question 12

indication of a malfunctioning inlet anti ice valve

Answer 12

inlet anti ice on advisory above 13 deg celsius

Question 13

max loss of Q associated anti ice and inlet anti ice

Answer 13

18 and 49% respectively