Ice and Rain Control Systems Flashcards
What are two methods of inflating pneumatic deicer boots?
engine bleed air, dry type pumps
What methods are used to supply heat for a thermal anti-icing system?
combustion heaters, shroud, ducts
What problems may be associated with electrically heated windshields?
delamination, arcing, or discoloration
How can electrically heated pitot tube with an ammeter installed be checked for operation?
feel for heat and observe current flow when activated
How are deicer boots attached to the leading edges of wing and tail surfaces?
adhesive
What prevents overheating of the wing leading edge skin in a thermal anti-ice system that is operated by engine bleed air?
thermal switches and pressure regulators
What normally keeps deicer boots held down in flight?
vacuum regulator and vacuum pressure
what is the function of the oil separator used in some deicer boot systems?
separates oil from the air
What must be accomplished to a deicer boot prior to performing a cold patch repair?
relieve tension, clean, buff
How is the temperature maintained in a thermal anti-icing system?
automatic temperature controller mixes hot and cold air
What are two inherent problems associated with windshields wiper when operated in flight?
reduced blade loading, inability to maintain speed
What powers windshield wiper systems?
electrical, hydraulic motors
What happens to the thermal anti-icing airflow after it has heated the leading edge surface?
it is vented overboard
Why are anti-icing systems using turbine engine bleed air provided with an overheat system?
to prevent airframe damage
When is windshield delamination acceptable?
as described by manufacturer
