30 ice and rain protection a321 Flashcards
what is the two technical mechanisms of anit/deicing on the a321
- hot air thermal ice protection
- electrical resistance thermal ice protection
what areas of the a321 use hot air?
- LE of slats 3, 4, 5
- engine intake
which locations have electrical heaters?
- waste water drain mast
- windshield
- TAT (total temperature probe)
- pitot tube (part of ADS - air data system)
- aoa sensor
what is the form of rain protection on the a321
windshield wipers
what is the a321 wing ice protection system
hot air evaporative
slats 3 4 5
how is hot air evenly distributed along the leading edge in the hot air evaporative antiicing?
piccilo tubes have schematicaly located holes for hot air to exit out of
draw a diagram of the bleed air being routed to its appropriate locations
see pic.
will resemble diagrams of the pneumatic system
draw a crosssection of a slat being hot air anti-iced
see pic
will have piccilo tube in teh centwe with air circulating and leaving out the bottom
how is the amount of bleed air taken controled
there is a restrictor orifice located immediately downstream of the bleed air control valve.
how is the engine intake antiice connected with the pneumatic system?
the bleed air is taken separately from the HP compressor and is independent of the aircraft pneumatic system
when are the window/probe heating used
when the engines are started (used continuously in flight)
which voltage is used for each of the heated probes
115 AC:
- pitot tubes
- aoa probes
- TAT probes
28V DC:
-static tubes
when the probe/window heat button is pressed, what is the order of sequenced computers that are notified
the button tells the CMU (control and monitoring unit) which tells the probes and the FWC (flight warning computer) . The FWC tells the ECAM
what is the means of rain protection
- windshild wiper
- rain repellent
when can the wiper be used?
taxy, take off, landing, approach
