ANTI-ICE AND RAIN Flashcards
Q.3.1. What are some of the reasons that the green ON light would extinguish on the Window Heat Panel?
-Switch is OFF
- An overheat is detected
- A system fault has occurred
- System is at correct temperature
Reference: FRM 3.1.1
Q.3.2. If a window heat switch is ON, and the associated green ON light is not illuminated, how can you determine if the system is operating normally?
Perform a window heat test.
Reference: AOM 16.3.1, FRM 3.1.1
Q.3.3. Selecting the OVHT position of the Window Heat Test Switch causes what to happen?
Simulates an overheat condition.
Reference: FRM 3.1.1
Q.3.4. With the PROBE HEAT Switch in AUTO, when is power automatically supplied to the probe heat system?
Power is automatically supplied to both the A and B probe heat systems when either engine is running.
(opens in a new tab)Reference: FRM 3.1.4
Q.3.5. What causes the COWL ANTI-ICE light to illuminate?
Indicates an overpressure condition in duct downstream of engine cowl anti-ice valve.
(opens in a new tab)(opens in a new tab)Reference: FRM 3.1.5
Q.3.6. The blue COWL VALVE OPEN lights have been replaced on the MAX with amber COWL VALVE lights, and associated QRH procedure; what do the amber COWL VALVE lights signify?
- Momentary - Related cowl anti-ice valve is in transit.
- Steady - Cowl anti-ice valve position disagree with related ENGINE ANTI-ICE switch position.
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Reference: FRM B737MAX 3.1.5
Q.3.7. What does the amber ENG ANTI-ICE light indicate on the MAX?
Cowl thermal anti-ice system has been inhibited due to a system failure or when an engine core anti-ice valve fails closed.
Reference: FRM B737MAX 3.1.5, B737MAX QRH 3.3
Q.3.8. The MAX has an additional engine anti-ice feature called Core anti-ice. How is it operationally controlled?
Core anti-ice is automatically controlled by the EEC’s with no crew input or indication of normal operation.
Reference: FRM B737MAX 3.2.5
Q.3.9. Besides controlling the engine anti-ice functions, what does placing the ENG ANTI-ICE switches to the ON position do?
Sets stall warning logic for icing conditions.
Note: Stall warning logic adjusts stick shaker and minimum maneuver speed bars on the airspeed indicator. FMC displayed VREF is not adjusted automatically.
Stall warning logic, airspeed indications, and minimum maneuver speeds on the airspeed indicator return to normal when the engine anti-ice is positioned OFF if wing anti-ice has not been used in flight.
Reference: FRM 3.2.5.1
Q.3.10. When using engine anti-ice, what additional idle speed is available in the MAX?
Icing idle, with the flaps UP and Approach Idle when flaps are extended.
Reference: FRM B737MAX 3.2.5.1
Q.3.11. What areas of the aircraft are heated with the Wing Anti-Ice Switch ON?
3 inboard leading-edge slats by using bleed air.
Reference: FRM 3.2.6
Q.3.12. What is the guidance for using wing anti-ice on the ground?
Do not operate wing anti-ice on the ground when OAT is above 10 degrees C.
Do not use wing anti-ice as a substitute for ground deicing/anti-icing.
The wing anti-ice switch will be turned OFF prior to beginning the takeoff roll.
Reference: AOM 3.5
Q.3.13. If the wing anti-ice is activated on the ground, what happens when the thrust levers are advanced for takeoff?
The wing anti-ice valves automatically close and at liftoff the wing anti-ice switch trips to the off position.
Reference: FRM 3.2.6.1
Q.3.14. In the MAX, what is the logic associated with the amber L VALVE and R VALVE lights?
Momentary
Related wing anti-ice valve is in transit.
Steady
Wing anti-ice valve position disagrees with related WING ANTI-ICE switch position.
Extinguished
Related wing anti-ice valve is closed (switch OFF), or related wing anti-ice valve is open (switch ON).
Reference: FRM B737MAX 3.1.6, 3.2.6.1
