COntrols and indicators

Question 1

Overheat light

Answer 1

Overheat condition
Elec power to window interrupted

Question 2

Window heat ON light OFF?

Answer 2

switch off
overheat detected
system failure
correct temp

Question 3

Window Heat TEST - OVHT?
PWR TEST?

Answer 3

1) simulated overheat condition
2) Confidence test

Question 4

Wiper setting - INT?

Answer 4

every 7sec

Question 5

Probe Heat light on STBY POWER?

Answer 5

Probe heat lights do not indicate system status.

Question 6

Probe Heat switches AUTO?

Answer 6

power auto to A and B probe heat system when either engine running.

Question 7

COWL ANTI ICE light, B738?

Answer 7

amber, overpressure in duct downstream of engine cowl anti Ice valve.

Question 8

Cowl Valve OPEN light, B738?

Answer 8

extinguished - valve close
Bright blue - cowl anti ic valve in transit, valve position disagrees with switch position.
DIM - cowl anti ice vale is OPEN

Question 9

MAX
1ENG ANTI ICE light
2COWL ANTI ICE light
3COWL VALVE light

Answer 9

1 thermal anti ice system inhibited due system failure or and engine core anti ice valve fails close.
2 overpressure in duct downstream engine cowl anti ice valve.
3 momentary - valve transit
steady - disagrees with switch
extinguished - close - switch off
open - switch ON

Question 10

MAX
engine anti ice switch ON / off

Answer 10

ON
opening cowl anti ice valve
stick shaker logic - icing cond
green TAI on engine display
OFF
stick shaker logic return normal if WAI not been used in flight.

Question 11

Thermal anti ice indication?

Answer 11

green - cowl anti ice valve open
Amber - valve disagrees with switch

Question 12

WAI
L / R VALVE OPEN light B738?

Answer 12

Bright blue
wai control valve transit
valve disagrees with switch
DIM BLUE
OPEN - with switch ON

Extinguished - valve closed with switch off.

Question 13

MAX, Wing VALVE lights.
L/R VALVE amber

Answer 13

Momentary
WAI valve in transit
Steady
WAI valve disagrees with WAI switch.
Extinguished - closed/open as per switch position.

Question 14

WAI switch

Answer 14

ON in air
WAI control vale open
stick shaker logic set for icing conditions. remain set for icing conditions for remainder of flight, regardless of switch position.
ON (ground)
valve open - both engines thrust below TO warning setting and temps below thermal switch activation temps.
Valve CLOSE - thrust above TO setting OR thermal switch activated.
Switch trip OFF at after lift off.