Q-ICE PROTECTION

Question 0

How long does each boot cycle for in the automatic mode ?

Answer 0

6 seconds

Question 1

How many boot cycles are there ?

Answer 1

6

Question 2

How long is the dwell time during automatic mode in fast / slow ?

Answer 2

24 seconds in fast mode

3 min/ 144 in slow mode

Question 3

What does the manual mode selection do on the airframe mode select selector ?

Answer 3

it manually heats up the DDV and the check valve heaters ( dual distributer valves )

Question 4

Will the airframe manual mode work if if the airframe mode selector is not in the manual mode ?

Answer 4

No airframe mode selector must be off or in manual.

Question 5

What is the indication of a leak in the pneumatic de-ice system ?

Answer 5

DE-ICE PRESS caution lights or de-ice pressure drops below 15 psi

Question 6

When do the ice-detecton probes give an ICE-DETECTION message ?

Answer 6

when they accumulate enough ice to change the vibration pattern

Question 7

How are the AOA vanes heated ?

Answer 7

Electrically automatically via AC power

Question 8

When do the pitot heat caution lights come on ?

Answer 8

when they are off

Question 9

What does INCREASE REF speed switch do ?

Answer 9

during icing it will increase Vref by 20 knots to help compensate for the condition
and the Low speed Cue increases

Question 10

What is the minimum oil temperature for inlet-splitter de-icing ?

Answer 10

65 degrees in flight within 3 minutes

55 degrees required for take off

Question 11

What conditions must be met for the engine intake adapter heaters to turn on ?

Answer 11

Bypass doors open
Temp less then +15
Engine oil with normal range

Question 12

What happens if one of the intake adapter heaters coils fail ?

Answer 12

No indication unless both the primary and secondary fails

you get the ENG ADP HEAT 1 or 2 caution panel

Question 13

How much ice must accumulate for the ICE DETECTED message to aluminate ?

Answer 13

0.5 MM of ice on the probes.

Question 14

On the prop selector switch, what must be met for the prop heat test when selected to test ?

Answer 14

Np must above 400 rpm

AC power available.

Question 15

What controls the prop heaters ?

Answer 15

The timer monitor control unit. ( TMCU )

Question 16

What’s the min temp for the TMCU to activate the heaters with corresponding TAT ?

Answer 16

Less then 5 degrees.

Question 17

What does ICE DETECT FAIL indicate ?

Answer 17

Both ice detector probes have failed.

Question 18

Will a failure of one Ice detector probe cause a DEICE fail caution ?

Answer 18

No only when two have failed.

Question 19

What is the isolation valve in the DEICE system ?

Answer 19

A valve that is normally open for uninterrupted flow to both pneumatic system.
The switch can be used to check pressure on either side.
It can be closed to isolate a leak on one Side.

Question 20

If the TMU temperature monitor fails, will the DDV heater stay on ?

Answer 20

Yes by default.

Question 21

If the TMU heater activation fails, will the DDV heaters come on automatically ?

Answer 21

No

Question 22

What happens if the TMU fails ?

Answer 22

A DE-ICE TIMER caution light

Question 23

When does the DEICE PRESS caution light come on ?

Answer 23

When the main DEICE pressure is less then 15 psi
Boot pressure does not reach 15 psi after DDV are open
Boot pressure remains at 15psi after DDV closes.

Question 24

fast

Answer 24

1 min

24 sec dwell

Question 25

slow

Answer 25

3 min

dwell time 2min +24

Question 26

prop heat operation in flight ?

Answer 26

.

Question 27

alpha vane heaters

Answer 27

AOA 115VAC

Question 28

ED message of the ICE DETECTED , is it steady or flashing ?

Answer 28

flashing