skyblue CBT ice and rain protection Flashcards
what does pneumatic air provide air to?
- wing leading edges
- stabiliser leading edge
- engine intake
- gas paths
where are chordwise boots used?
wing leading edges and gas paths
what is used for the engine intakes?
annular boot which inflates at the inlets
how is a deflated boot held to the surface?
`bleed air venturi effect
what controls inflation of the boots?
associated distribution valve
how many dual distribution valves are there?
7.
- 1 each for the intakes
- 2 on each wing
- 1 for horizontal stabliser
what gets heated electrically?
- prop
- windshields
- probes
- static ports
- flight control horns
what powers the prop heat?
ACW BUS 1 and 2
What powers the de icing on the TAT, pitot and alpha probes?
ACW BUS 1 and 2
what powers the standby pitot tube de icing?
STBY 115V ACW
ACW BUS 1
what powers heating for the 2 forward windshields?
ACW BUS 1 and 2
what powers heating for the 2 side windshields?
DC BUS 1 and 2
what powers de icing for the control horns?
ACW BUS 1 and 2
where is the icing evidence probe?
under the captains windshield
what controls the icing probe light?
nav light switch
where is the ice detector probe located?
in between the boots underneatth the left wing
what powers the ice detector probe?
ACW BUS 2
What will we get when ice is acrueing on the detector probe?
master caution and icing annunciation
when is the aural alert chime for the icing probe inhibited?
when the de ice boots are activated
when will the ICING light illuminate?
when 0.5mm of has have accrued on the probe. at this point a heat cycle will be started to remove the ice and start the process again
will the icing probe detect supercooled droplets
not reliably
what provides air for the engine and wing antic icing?
high pressure bleed system
where is HP bleed air tapped for the icing system?
before the bleed valve
can low pressure air be used for de icing?
no
what opens de ice valves?
pushing the AFR AIR BLEED valve to on
what delivery pressure do the icing valves deliver through modulation?
20.3psi
does the position of the bleeed valves affect position of te icing valves?
no
where does air travel after the icing valve?
dual distribution valves which are electrically powered and pneumatically operated
what powers the left dual distribution valves?
DC EMER BUS
what powers the right dual distribution valves?
DC BUS 2
where to the dual distribution valves for the inlet split air to?
engine intake boot
engine throat boots
what does the S flow gas path system do?
ejects inlet ice overboard
what do shutoff valves isolation downstream of the dual distribution valves do?
prevent air from entering the de icing system if there is a leak downstream
what do the isolation valves connect?
connect pneumatic air supply from each engine to a common manifold. this allows rhe system to remain operative when OEI
what powers the isolation valves?
DC ESS BUS