Anti-Ice and Rain Flashcards
1
Q
Describe the operation of the Engine Anti-Ice Switch.
A
- ON - ENG Anti-Ice Valve and PRV Commanded OPEN, allowing Bleed air to heat the engine cowl, Idle goes to Approach, Continuous ignition.
- OFF (ON not visible) - Valve is commanded closed
- VALVE Illuminated - valve disagrees with switch position.
- TAI appears on EICAS below N1 when System is ON.
2
Q
TAT Light
A
Probe is not being heated in flight.
(TAT light inhibited on ground).
(TAT Heat should be automatic, after engine start).
3
Q
What does the anti-ice and rain system include?
A
- Engine Anti-Ice
- Wing Anti-Ice
- Flight Deck Window Heat
- Windshield Wipers
- Probe Heat
4
Q
Describe the Wing Anti-Ice System.
A
- Used as De-ice (When EICAS ICING Appears)
- Used as Anti-Ice in Icing Conditions below FL220.
- BLD Air Sourced After ENG BL Valve; Before ISLN Valve.
- Inhibited on the Ground.
- Provides protection to three outboard LE slats.
5
Q
Describe Flight Deck Window Heat.
A
- Electric.
- Forward windows have Anti-Ice and Fog. ( Side- Fog only.)
- Window Heat Switch ON operates as soon as power is established.
- Automatically protected from “thermal shock.”
- Air is ducted along top of forward windows continuously.
- INOP Light indicates that a window is not being heated
6
Q
Describe Probe Heat operation.
A
- Fully Automatic.
- Heated when an engine is running, except
- TAT Fault Light is only active when airborne.
- Light indicates that a probe is not heated when commanded (in flight).
7
Q
When do we turn ENG AI ON? OFF?
A
- ON when temperature less than 10C with visible moisture or contamination present / expected, except when climbing / cruising and SAT < -40
- ON in icing conditions with power reduced, all temps.
- OFF when TAT is greater than 10C.
8
Q
CF6-80A Engine Icing Consideration
A
In icing conditions, maintain N1 above:
45%, at or above 10,000’
40%, below 10,000’