Ice and Rain Protection Flashcards
When should anti-ice systems be turned on?
Whenever in visible moisture with OAT +10 deg C or below
OAT stands for Outside Air Temperature
What are the types of anti-ice systems mentioned?
- Pitot-Static / A of A heat Electrical
- Engine Anti-Ice
- Cowl & Stators Bleed Air & Electrical
- Wing Leading Edge Heat
- Windshield Anti-Ice Heat Bleed Air
- Precooler Inlet NACA
What does OAT stand for?
Outside Air Temperature
OAT is a crucial factor in determining when to activate anti-ice systems.
True or False: Anti-ice systems should be used only when the temperature is below freezing.
False
Anti-ice systems should be activated when the temperature is +10 deg C or below.
Fill in the blank: The _______ is used for Pitot-Static and A of A heat.
Electrical
What component provides heat to the windshield for anti-ice?
Windshield Anti-Ice Heat Bleed Air
Which anti-ice system is associated with the wing leading edge?
Wing Leading Edge Heat
What is the primary method used for surface de-icing?
Bleed Air
Surface de-ice systems often utilize bleed air to prevent ice accumulation on aircraft surfaces.
What substance is used for Captain’s Windshield de-icing?
Alcohol
Alcohol serves as a de-icing agent for the Captain’s Windshield.
What is the backup system for windshield de-icing?
Windshield Bleed Air
Windshield bleed air serves as a backup to the alcohol de-icing system.
RAIN REMOVAL SYSTEMS (Bleed Air / Mechanical)
- Both windshield augmenter doors Bleed Air/Mechanical
What are boots in the context of surface de-ice?
Inflation tubes bonded to the leading edge and coated with anti-static coating
What pressure does the tailcone regulator provide to the control valves?
23 psi
How long is the inflation cycle for each control valve?
6 seconds
What is the duration of the rest period after the inflation cycles?
3 minutes
What vacuum pressure do the ejectors in each control valve create?
5.5” Hg
What happens during the first cycle of the inflation process?
Left horizontal stabilizer control valve energizes closed for 6 seconds
What occurs during the six-second dwell period?
Both control valves de-energize open for 6 seconds
What happens during the second cycle of the inflation process?
Right horizontal stabilizer control valve energizes closed for 6 seconds
What is the purpose of the separate pressure switch for each cycle?
Closes at 16 psi to activate the white TAIL DE-ICE annunciator
How quickly should boots inflate after activation?
Within 2 seconds
What is the maximum time allowed for deflation of the boots?
12 seconds
What are the positions of the control switch for the tail de-ice system?
TAIL AUTO/OFF/MANUAL
What does the OFF position of the control switch do?
Interrupts timer cycle and deflates all the boots
