De-icing System Flashcards
List the areas protected by the de-ice system
Wing, horizontal stabiliser, and vertical stabiliser leading edges.
Propellers
Windshield
Type of fluid and 2 authorised brands
Glycol based.
AL-5
Aeroshell compound 07
Storage tank location and capacity
Front baggage compartment, 30 litres useable
How many pumps are in the airframe and windshield systems
2 electric pumps in each
To what do the pumps feed de-icing fluid, in order to control the application
Proportioning units, in each engine nacelle, and the tail
List the application methods of the de-icing system
Leading edges: porous surfaces
Propellers: slinger rings and centrifugal force
Windshield: spray bar at base
For how long does windshield de-icing operate after the button is pressed
5 seconds
What powers the system and through what
LH MAIN BUS, through XFR PUMP/DE-ICE circuit breaker
When will the low level sensor trigger, and how long will the system operate for after this warning
When 10 litres or less is detected, will last a further ~45 minutes in NORM mode
How much fluid must be carried for dispatch into known icing conditions, to operate for how long
22 litres at least (roughly 3/4 tank), to operate for roughly 1hr30mins in NORM mode
Number of pumps, flow, and duration of NORM mode
Both pumps, 30 secs on 90 secs off, lasts ~2.5hrs
Number of pumps, flow, and duration of HIGH mode
Active pump, continuous flow, lasts ~1 hour
Number of pumps, flow, and duration of MAX mode
Both pumps, continuous flow for 2 minutes after button press, lasts ~30 mins
Must the other de-icing be active for the windshield de-icing to function
No, they are two separate systems
What does the guarded alternate switch do?
Connects pump 2 directly to the RH MAIN BUS
