Ice & Rain Protection

Question 1

What position does the Cabin Window Heat switch need to be in prior to takeoff?

Answer 1

Cabin Window Heat - depressed

Question 2

What does a WING HOT message mean?

Answer 2

Wing temp is >180F

Question 3

Auto activation of the cowl and wing anti-ice system is not functional above what altitude?

Answer 3

FL350

Question 4

If the wing and/or cowl anti-ice system is automatically activated during descent, at what point will it terminate automatically?

Answer 4

When the WoW system shifts to ground mode

Question 5

How are the TAT probes properly checked prior to flight?

Answer 5

Check for proper aspirated airflow at the aft end of the probe after APU air ON

Question 6

When must the cowl anti-ice system be turned on?

Answer 6

Temp < +10C and visible moisture

Question 7

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

Answer 7

Decrease engine power to idle for 5 sec, then accelerated to above 90% LP RPM

Question 8

What is the minimum speed for holding in icing conditions?

Answer 8

160 KCAS

Question 9

When is automatic activation of the cowl and wing anti-ice systems inhibited?

Answer 9

Below 1500’ AGL and above FL350

Question 10

When should continuous air start ignition be selected ON?

Answer 10

Contaminated runway, heavy rain

Question 11

When does the anti-ice system turn back off once automatically turned on?

Answer 11

L-R ice detect: 60 sec
Cowl A/I: 3 mins
Wing A/I: 5 mins

Question 12

What is the power source of the windshield heat?

Answer 12

Left Front / Right Side: L MAIN AC Bus

Right Front / Left Side: R MAIN AC Bus

Question 13

At what temp does the windshield heat cycle?

Answer 13

Automatically: ON @ 104F, OFF at 114F

Question 14

What does it mean if the WINDSHIELD HEAT annunciation lights begin blinking at 1 cycle per second for 90 seconds followed by an amber WSHLD FAIL message?

Answer 14

1. Over-temp condition
2. Both heat sensors have failed
3. Over-current or no-current detected with switch selected ON
4. Current detected with switch selected OFF

Question 15

What does it mean if the WINDSHIELD HEAT annunciation lights begin blinking at 3 cycles per second for 90 seconds followed by a blue L/R/F/S WSHLD FAULT message?

Answer 15

1. Single windshield sensor failure

2. Windshield heating film exceeds acceptable range of operation

Question 16

Which anti-ice probes use bleed air on the ground?

Answer 16

TAT Probes

Question 17

Which probes are powered during HMG operations?

Answer 17

AOA 1 - L ESS DC
AOA 2 - R ESS DC
L upper & R lower PITOT - L/R STBY AC
L lower & R upper PITOT - ESS AC
TAT 1 - L STBY AC
TAT 2 - R STBY AC

Question 18

Since the COWL & WING ANTI-ICE systems operate in the AUTO mode between 1500’ AGL and FL350, what must be done in icing conditions below 1500’ AGL ON APPROACH?

Answer 18

Nothing, it will remain ON in the AUTO mode until WoW

Question 19

What is the power source of the windshield blower system, and when does it operate?

Answer 19

LEFT MAIN AC BUS, ground only

Question 20

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

Answer 20

10 minutes on, 10 minutes off - NOT RECOMMENDED