anti-ice, rain Flashcards
what does it mean when the WINDOW OVERHEAT Amber Light comes on ?
overheat condition in the window heating system is detected
page 3.10.1
aside from coming on if an overheated situation has been detected, does the WINDOW OVERHEAT Amber Light come on for any other reason ?
OVERHEAT lights also illuminate if electrical power to window(s) is interrupted
page 3.10.1
what does it mean when the Window Heat ON Green Light come on ?
window heat is being applied to selected window(s)
page 3.10.1
how can the Window Heat ON Green Light be extinguished ?
- switch is OFF, or
- an overheat is detected, or
- a system failure has occurred
- system is at correct temperature
page 3.10.1
is the WINDOW HEAT Test Switch spring-loaded ?
YES
page 3.10.1
when you select the OVHT mode in the WINDOW HEAT Test Switch what does it do ?
it simulates an overheat condition
page 3.10.1
what does the PWR TEST mode of the WINDOW HEAT Test Switch do ?
provides a confidance test
page 3.10.1
how do you activate the FOOT AIR controls to supply conditioned air to pilot’s leg ?
by pulling
page 3.10.2
how do you activate the WINDSHIELD AIR Controls to supply conditioned air to n1 window for defogging ?
by pulling
page 3.10.2
explain the 4 different modes of the Windshield WIPER Selectors ?
PARK – turns off wiper motors and stows wiper blades. INT – seven second intermittent operation.
LOW – low speed operation.
HIGH – high speed operation
page 3.10.2
why do the Probe Heat Amber Light illuminate ?
if related probe is not heated
page 3.10.3
if operating on stand by power do the Probe Heat Amber Lights indicate system status ?
NO
page 3.10.3
what happens when the TAT TEST Switch is pushed ?
electrical power will be applied to TEMP PROBE on the ground
page 3.10.3
when the COWL ANTI-ICE Amber Light comes on is an indication of what ?
indicates an overpressure condition in duct downstream of engine cowl anti–ice valve to the cowl lip
page 3.10.4
what causes the COWL VALVE OPEN Blue Light to illuminate “bright” ?
- related cowl anti–ice valve is in transit,
or,
- cowl anti–ice valve position disagrees with related ENGINE ANTI–ICE switch position
an amber TAI indication illuminates on the CDS after a short delay
page 3.10.4
what causes the COWL VALVE OPEN Blue Light to come on “dim” ?
related cowl anti-ice valve is open (switch ON)
page 3.10.4
aside from the related engine anti-ice valve being opened what else happens when the ENGINE ANTI-ICE Switch in ON ?
sitck shaker logic is set for icing conditions
page 3.10.4
aside from the related engine anti-ice valve being closed what else happens when the ENGINE ANTI-ICE Switch in OFF ?
stick shaker logic returns to normal if wing anti–ice has not been used in flight
page 3.10.4
what colour of the Thermail Anti-Ice Indicater indicates the cowl anti-ice valve(s) open ?
green
page 3.10.4
what does it mean when the TAI (thermal anti-ice indication) is Amber colour ?
cowl anti–ice valve is not in position indicated by related engine anti–ice switch
page 3.10.4
what causes the Wing Anti-Ice VALVE OPEN Blue Light to go “bright” ?
- related wing anti–ice control valve is in transit,
or,
-related wing anti–ice control valve position disagrees with WING ANTI–ICE switch position
page 3.10.5
what causes the Wing Anti-Ice VALVE OPEN Blue Light to stay “dim” ?
related wing anti–ice control valve is opened (switch ON)
page 3.10.5
what happens when the WING ANTI-ICE Switch is ON in the air ?
- wing anti–ice control valves are open
- stick shaker logic is set for icing conditions
- MIN Va set on ASI,
- FMC VREF not adjusted automatically
- STICK SHAKER remains in ICING position throughout the flight regardeless of subsequent WING ANTI-ICE switch position
page 3.10.5
the stick shaker logic is set to icing condition when the wing anti-ice Switch is ON, does it stay like that until the end of the flight regardeless of the WING ANTI-ICE Switch ?
YES
page 3.10.5
what happens when the WING ANTI-ICE Switch in ON on the ground ?
WING ANTI-ICE CONTROL VALVES OPEN:
- IF thrust on both engines is below takeoff warning setting,
and
- IF temperature inside both distribution ducts is below thermal switch activation temperature
WING ANTI-ICE CONTROL VALVES CLOSE:
- IF either engine thrust is above takeoff warning setting,
or
- IF thermal switch is activated in either distribution duct. Switch remains ON
- switch trips OFF at lift–off
what are the systems that provid ice and rain protection ?
- Thermal anti-icing (TAI),
- electrical anti-icing,
- windshield wipers
page 3.20.1
what do the anti-ice and rain protection systems include ?
- Flight Deck Window Heat
- Windshield Wipers
- Probe and Sensor Heat
- Engine Anti-Ice System
- Wing Anti-Ice System
page 3.20.1
which window does the FWD WINDOW HEAT switch control heat ?
window n 1
page 3.20.2
which window does the SIDE WINDOW HEAT switch control heat ?
window n 2
page 3.20.2
what prevents the formation of ice on the engine cowl lip ?
engine bleed air thermal anti-icing
page 3.20.4
do the engine have two separated ENG ANTI-ICE Switches ?
YES
page 3.20.4
what happens when the ENG ANTI-ICE switch is ON ?
- allows engine bleed air to flow through the cowl anti–ice valve for cowl lip anti–icing
- sets stall warning logic for icing conditions
page 3.20.4
what does the Wing Anti-Ice system provide protection to ?
the three inboard leeding edge slats
page 3.20.5
when on the ground, after positioning the WING ANTI-ICE switch ON, what are the minimum parameters for both control valves to open ?
- thrust on both engines has to be below the setting for takeoff warning activation,
and
- the temperature inside both wing distribution ducts has to be less than the thermal switch activation temperature
the valves will otherwise stay close
page 3.20.5
what happens to the WING ANTI-ICE if selected ON but with the air/ground sensor in the ground mode ?
the switch remains in the ON position regardless of control valve position.
page 3.20.6
when at lift-off the air/ground sensor goes on Air Mode, what would happen to the WING ANTI-ICE switch ?
automatically trips OFF
page 3.20.6
what happens when during flight the WING ANTI-ICE switch is positionated ON ?
- opens both control valves
- sets stall warning logic for icing conditions.
- MIN Va set on ASI
- FMC VREF not adjusted automatically
- STICK SHAKER remains in ICING position througout the flight regardeless of subsequent WING ANTI-ICE switch position
page 3.20.6
when the WING ANTI-ICE is ON the Stall Warning Logic is adjusted for icing conditions, as a consequence what does the stall warning logic adjust ?
- adjusts stick shaker
- MIN Va bars on airspeed indications.
- FMC displayed VREF is not adjusted automatically.
page 3.20.4
