Anti-ICE, RAIN Flashcards
Recall when the use of engine anti-ice is required
ON THE GROUND:
- Immediately after engine start and remain on during all ground ops when icing present or anticipated
- Icing conditions exist <10 deg TAT and any visible moisture with <1600 meters visibility also ice slush snow sleet standing water present on airfield
NOTE: Engine anti-ice is not required on the ground when the temp is <-40 C OAT
IN FLIGHT
757 OP PROCEDURES
-Operate engine A/I ON when in visible moisture at TAT is +10C or below, no exceptions
767 OP PROCEDURES
- Engine anti-ice must be AUTO or ON during all flight ops when icing conditions exist/anticipated, except during climb/cruise when the temp is <-40C SAT.
- Engine Anti-ice must be AUTO or ON before, and during descent in all icing conditions, including <-40C SAT
- when operating in areas of possible icing, activate engine anti-ice before entering icing conditions
NOTE: Engine anti-ice must be in AUTO or ON before and “during descent in all icing conditions” even when temps below -40C SAT
Recall the conditions that require the use of wing anti-ice
Ice accumulation on:
- flight deck windshield frames
- windshield center post
- windshield wiper arm
- side windows
Can be indications of airframe icing conditions
CAUTION: Do not operate wing anti-ice when the total air temperature (TAT) is above 10C
Recall when the probe heat operates
When an engine is operating
Describe the proper switch / selector positions for the ground and airborne use of the wing and engine anti-ice systems in icing and non icing conditions
IN ICING CONDITIONS
IN ICING CONDITIONS
“Switch” airplanes
- On the ground - WING off, L/R ENG ON
-Airbone (After takeoff flow) - WING ON or OFF As Req. L/R ENG ON
“Selector Airplanes”
- On the ground - WING OFF, L/R ENG ON
- Airbone (After Takeoff flow) - WING AUTO, L/R ENG AUTO
NOTE: AUTO / AUTO / AUTO accomplished on the After Takeoff Flow
NOTE: Engine Bleed air MUST be used for anti-icing as the APU bleed air is insufficient. During single engine taxi, when engine anti-ice is required, operate one pack only
Describe the proper switch / selector positions for the ground and airborne use of the wing and engine anti-ice systems in icing and non icing conditions
NOT IN ICING CONDITIONS
NOT IN ICING CONDITIONS
“Switch” airplanes
- On the ground - WING off, L/R ENG OFF
-Airbone (After takeoff flow) - WING OFF, L/R ENG OFF
“Selector Airplanes”
- On the ground - WING OFF, L/R ENG AUTO
- Airbone (After Takeoff flow) - WING AUTO, L/R ENG AUTO
NOTE: AUTO / AUTO / AUTO accomplished on the After Takeoff Flow
Know that only on “switch” equipped aircraft, EICAS advisory messages will appear as the ice detection system cycles, such as ICE DET ON and ICE DET OFF
Recall when wing anti-ICE operation is inhibited
On the ground
Recall which bleed air source (Engine or APU) of pneumatic air should be used for engine and wing anti-icing
Engine bleed air must be sufficient for all anti icing
APU bleed air is insufficient
Explain the meaning of an illuminated CAPT or FO PITOT light
Captain or FO Pitot (CAPT / FO PITOT) lights
Illuminated (amber)
- the aircraft is on the ground and neither engine is operating
Or
- the probe is not being heated
Explain the meaning of an illuminated ICING light
“SWITCH” Airplanes
ICING Light
- Illuminated (amber) - the ice detecting sensor has detected ICE
“SELECTOR” Airplanes
- Illuminated (amber) - Engine / wing icing is detected and either engine or wing anti ice is manually selected OFF or an anti-ice valve is closed
Explain the meaning of an illuminated WINDOW HEAT INOP light
Window Heat Inoperative (INOP) lights
Illuminated (amber)
- the window is not being heated
Explain the meaning of an illuminated ICE DET (ice detector) light
(On 767 aircraft with anti-ice “Selectors”)
Ice Detector (ICE DET) light
Illumianted (amber)
- ice detector system is failed
NOTE: This is because BOTH ice detectors have failed
Recall that “selector” equipped aircraft with WING and L/R ENG selected to AUTO do not generate EICAS messages or discrete flights unless there is a system fault
- In AUTO, an engine anti-ice fault is indicated by a discrete ICING light and a discrete L/R ENG VALVE light
- the discrete ICING light will produce the Master CAUTION EICAS message ICING ENGINE
- The discrete L/R ENG VALVE light will produce the ADVISORY EICAS message (L/R) ENG ANTI-ICE
- In AUTO, a wing anti-ice fault is indicated by a discrete ICING light and a discrete L/R WING VALVE light
- The discrete ICING light will produce ADVISORY EICAS message ICING WING
- The discrete L/R WING VALVE light will produce the ADVISORY EICAS message L/R WING ANTI-ICE
Know that some aircraft DO NOT have ice detection system (ICING light) installed.
