Ice and rain protection

Question 1

ALPHA

Answer 1

ACW supply. AMBER LT
illuminates in case of FAIL or
power loss. CAP

Question 2

TAT

Answer 2

no heated. CAP. (ACW supply)

heating inhibited on ground.

Question 3

PITOT tube

Answer 3

not heated. CAP. (ACW bus
1 for CPT and ACW bus 2 for
F/O).

Question 4

STAT

Answer 4

Static port not heated (On
ground only, not monitored in
flight). CAP. (DC BUS)

Question 5

PITOT STBY

Answer 5

not heated.
ACW BUS 1 or 115 AC STBY
BUS as back up.

Question 6

WINDSHIELD HTG

Answer 6

ACW supply. Outer surface

+2°C. Inner +21°C

Question 7

WINDSHIELD HTG FAULT

Answer 7

Power loss or failure. CAP.

Question 8

CAPT, STBY and F/O

Answer 8

Normal operation - ON

depressed) and OFF (released

Question 9

WIPER rotary
selector:
OFF: 
SLOW: 
FAST:

Answer 9

wiper stops at the end
of travel (park) position
wiper operates at 80
cycles/min
wiper operates at 130
cycles/min

Question 10

Ice detector panel and

icing AOA - FAULT

Answer 10

FAULT
detector failure or supply loss (ACW
BUS 2). CAP.

Question 11

Ice detector panel and

icing AOA - PTT pb

Answer 11

PTT pb
press for 3’’:
– icing will flash if system works
correctly.
– FAULT LT illuminates steady if ice
detector failure is detected

Question 12

Ice detector panel and

icing AOA - ICING AOA Lt illuminates green as soon as

Answer 12

• 1 horn anti-icing on.
• Stall alarm + stick shaker threshold lowered.
• When light ON, the angle of attack for the stall warning is reduced.
• It can be extinguished manually only by releasing ICING AOA P/B provided both horns anti-icing are selected OFF.

Question 13

Ice detector panel and

icing AOA - ICE DET

Answer 13

ICE DET indicator Lt: ACW bus 2.

Question 14

Ice detector panel and
icing AOA - ICING
illuminates amber when

Answer 14

Ice accretion is detected provided both horns anti-icing and airframe de-icing are selected ON.

Question 15

Ice detector panel and icing AOA - ICING flashes amber when

Answer 15

Ice accretion is detected and horns anti-icing and/or

airframe de-icing are not selected ON

Question 16

MODE SEL PROP NORM:

Answer 16

10 sec on per 3 blades; then 10 sec of between cycles.

Question 17

MODE SEL PROP NORM - ON (HIGH POWER):

Answer 17

20 sec on per 3 blades.

No pause between cycles

Question 18

MODE SEL ENG AND AIRFRAME

• SLOW:
• FAST:

Answer 18

• 240’’/cycle

- 60’’/cycle

Question 19

AFR AIR BLEED FAULT:

Answer 19

Air dowstream deice valve 230 deg.

Question 20

DE ICING LIGHT

Answer 20

– Illuminates when airframe deicing syst is ON

– Flashes when airframe deicing syst still selected ON 5 min after last ice accretion detection