Ice and Rain Protection And Flight Controls

Question 1

For operation in icing conditions, what engine protection must be on?

Answer 1

Engine intake bypass doors open and engine ignition switch at manual.

Question 2

When do icing conditions exist?

Answer 2

SAT on the ground is 10 or below or in the air is 5 or below and visible moisture in any form is present including fog with vis below 1NM.
Also if on the ground and 10 degrees or below with surface snow, ice, standing water or slush.

Question 3

What are the ice protection systems on the dash 8?

Answer 3

Stall warning vanes 
Anti iced Pitot tubes and static vents 
Anti iced cockpit windows 
heated prop blades 
elevator horn heaters 

Pneumatic boots

Engine intake heater

Question 4

When does the DEICE PRESS caution light illuminate?

Answer 4

When the pneumatic pressure within the deice system falls below 5.5PSI.

Question 5

When do the L or R ELEV HORN HEAT caution light illuminate?

Answer 5

Horn heater element failed, it’s unpowered or the test circuit is activated.

Question 6

What will happen if one of the pilots or the side window overheats?

Answer 6

A caution light will appear and the affected panel is automatically de-energised.

Question 7

What does the PITOT HEAT 1 or 2 caution light mean?

Answer 7

The associated Pitot head heater failed or is not selected on.

Question 8

How many pressure regulators supply bleed air for the pneumatic De-ice system? Were does the regulator tap air from?

Answer 8

2, there is one in each nacelle.
Air is taken from upstream of the nacelle shut off valve. This ensures bleed air is still available for De-ice if the bleed air is switched off.

Question 9

What is the inflation time for a deice boot?

What is the dwell time on the fast and slow cycles?

Answer 9

6 seconds
Fast dwell is 24 seconds
Slow dwell is 204 seconds

Question 10

What PSI does the boot need to reach for its indicator to light up?

Answer 10

15PSI

Question 11

Which icing systems are powered by the 115v variable frequency AC?

Answer 11

Prop De ice 
Windshield heat 
Elevator horn heat 
AoA vane heat 
Engine intake heater lip

Question 12

What are the timings for prop heating for the above -10 and below -10 settings?

Answer 12

Above -10 each blade will heat for 10 seconds then switch off for 1 minute
Below -10 each blade will heat for 20 seconds then switch off for 1 minute.

Question 13

Can the prop heaters and elevator horn heat work on the ground?

Answer 13

No, to prevent from overheating the PSEO senses WOW and prevents the heaters from working. They can be tested as the test switch bypasses the protection, but RPM needs to be min 900 for prop cooling.

Question 14

Wrap around heaters for water drains, check valves etc operate off which power source and when?

Answer 14

Secondary 28v DC and are activated automatically by thermostats below 10 degrees

Question 15

How are heaters on the distributor assemblies activated?

Answer 15

Manually using the valve heat switch

Question 16

How is the stall warning vane heated?

Answer 16

28v DC on the ground and 115v variable frequency AC in the air.

Question 17

What does the #1 or #2 RUD HYD caution light indicate?

Answer 17

Loss is pressure in the associated rudder hydraulic actuator.

Question 18

What could the RUD PRESS caution light indicate?

Answer 18

Rudder pressure regulator fails to reduce to 900PSI above 140kts,
Rudder pressure regulator fails to increase to 1500PSI below 140kts,
System pressure is 3000 and airspeed above 140kts.

Question 19

How many degrees further to the rudder setting can the yaw damper move the rudder? How about the trim?

Answer 19

5 degrees left or right

Trim 10 degrees left or right

Question 20

What is the maximum rudder deflection when flaps are retracted and extended?

Answer 20

12 degrees L and R when retracted

16L 18R when extended

Question 21

What is an indication and remedy for a rudder Jam?

Answer 21

The PFCS RUD ‘push off’ will illuminate. Push the button which depressurises the associated rudder actuator.

Question 22

Which primary controls have a disconnect feature?

Answer 22

Pitch and roll

Question 23

What would you do if you lose control of the elevator and manual trim control?

Answer 23

Arm the standby elevator trim and trim Nose up or down as required.

Question 24

Above what speed are the outboard roll spoilers De energised?

Answer 24

140kts

Question 25

What should pilots do if the have a roll control malfunction?

Answer 25

Hold aileron to keep wings level.
if pushoff light illuminates, push off

If the pushoff light doesn’t illuminate apply power and increase speed for better control.

Question 26

If a roll cable breaks, what would you expect to see? What is the recall ?

Answer 26

SPLR1 and SPLR2 push off lights illuminate. Push both. This will De energise both so if any spoilers were up at the time of the malfunction, the air load will push them down.