De-Icing System Questions Flashcards
Operating temperature of the de-ice system?
-40 to +40 for boots
Below what temperature can icing occur?
10 degrees
Flap limit with failed pneumatic boots?
0 degrees
Flap limit when operating with functional boots?
15 degrees
What will pusher ice mode do to a defined stalled angle of attack?
Will be decreased by 8 degrees.
How long does it take for the inertial separator door to fully open?
30 seconds
At what temperature does the windshield heat automatically turn off?
+60 degrees
What is the boot inflation sequence? How many seconds per surface?
- Stabilizer
- Bottom inboard
- Top inboard
- Bottom outboard
- Top outboard
8 seconds per surface
How many modes of operation do the boots have?
2 modes of operation!
3 min = 8s x 5 and 140s delay
1 min = 8s and 20s delay
Why is there a 5 sec delay when prop device is switched on?
It is running a self test.
AoA de-ice CAWS illuminates how many seconds after probe heat is turned off?
3 minutes
At what speed does pusher become inactive?
Above 163kts
Conditions to activate PUSHER ICE MODE:
- Boot cycle
- Prop heat
- Separator open
(limited to 15 flaps)
In what ways does the prop heat system monitor self performance?
- Left OAT sensor failure
- Discrepancy between left and right OAT sensors
- Incorrect current
- Incorrect voltage
- Self-test failure
How is the prop heat system powered?
- GEN 1 BUS
- Battery BUS
(main power is supplied from the GEN 1 BUS)
