Ice and Rain

Question 1

The cabin window heat switch normally indicates OFF when on the ground. What position should the switch need to be in prior to takeoff?

Answer 1

Depressed - IN, indicating - OFF

Question 2

When must the cowl anti-ice system be turned ON

Answer 2

When ambient temp is less than 10°C and visible moisture is present

Question 3

If engine vibration increases while flying in icing conditions, what is the corrective action?

Answer 3

Decrease engine power to idle for 5 seconds, then accelerate the engine above 90% LP

Question 4

The minimum airspeed for holding in icing conditions is

Answer 4

160 KCAS

Question 5

The automatic activation fo the cowl and wing anti-ice system is inhibited

Answer 5

Below 1500 AGL on takeoff, above FL350 and when there is weight on wheels.

Question 6

How does the anti-ice system automatically turn OFF

Answer 6

L-R ice detect message after 60 seconds

Cowl anit-ice after 3 minutes
Wing anti-ice after 5 minutes

Question 7

If the WINDSHEILD HEAT annunciator lights begin blinking at 1 cycle per second for 90 seconds followed by an amber WSHLD FAIL message, what 4 things have occurred?

Answer 7

Four things:
Over-temp
Both heat sensors have failed
Over-current or no current detected with switch selected ON
Current detected with switch selected OFF

Question 8

What would cause the WINDSHEILD HEAT annunciation lights to begin blinking at 3 cycles per second for 90 seconds followed by a Blue L/R F or (S) WSHLD FAULT message?

Answer 8

Singe windshield sensor failure

OR

Windshield heating film exceeds acceptable range of operation

Question 9

Which 6 probes are powered during HMG operation?

Answer 9

AOA # 1 - L ESS DC
AOA #2 - R ESS DC
Left upper/right lower pitot - L/R STANDBY AC BUSES
Right upper/left lower pitot - ESS AC BUS Phase A
TAT #1 - Left STANDBY AC BUS
TAT #2 - R STANDBY AC BUS

Question 10

What is the time limit for the cabin window heat on the ground?

Answer 10

10 minutes ON, followed by a 10 minute cooling period

Question 11

After turning them on, why do the windshield heat lights blink on an off at irregular intervals?

Answer 11

The system keeps the windows at 114°F by cycling the heating coils. The light turns on when the heating coil turns on.

Question 12

Which anti-ice probes use bleed air?

Answer 12

TAT probes - while on the ground.

Question 13

What are the temperatures for Wing Anti-Ice
Normal
Wing Low CAS
Wing Hot CAS

Answer 13

100° - Low
130° - Normal
180° - High

Question 14

When will ice detector display “ICE…” in CAS?

Answer 14

Immediately upon detecting ice on the vibrating probes