KV 2020 Deice/anti ice procedures Flashcards
Give at least two atmospheric conditions that require a cold weather inspection.
(Ref. SOPM Ch. 4)
COLD WEATHER OPERATIONS
A Cold Weather Preflight inspection must be performed by a flight deck crewmember during the external inspection to determine the wings are free from frozen contaminants when:
• The OAT is 5°C or less, or
• The wing fuel temperature is 0°C or less, or
• Atmospheric conditions conducive to icing exist, or
• The aircraft has remained overnight and may have frozen contaminants due to exposure to frost or precipitation, which could involve the entire airframe, or
• On any through flight where residual ice from the inbound flight may have accumulated on airframe surfaces or components, or
• Cold soak ice is suspected in the fuel tank area.
When would the pilot select A/I to ALL?
(SOPM CH2.OPERATON IN ICING CONDITIONS)
OPERATION IN ICING CONDITIONS
There is no temperature limitation for anti-icing system automatic operation.
On ground:
• The TO DATASET MENU on the MCDU must be set to ENG in the following cases when OAT is from 5°C to 10°C and:
– When there is any possibility of encountering visible moisture up to 1,700ftAFE.
– When operating on-ramps, taxi-ways, or runways where surface snow, ice, standing water, or slush may be ingested by the engines, or freeze on engines, nacelles, or engine sensor probes.
• The TO DATASET MENU on the MCDU must be set to ALL in the following cases when OAT is less than 5°C and:
– When there is any possibility of encountering visible moisture up to 1,700ftAFE.
– When operating onramps ,taxiways, or runways where surface snow, ice, standing water, or slush may be ingested by the engines, or freeze on engines, nacelles, or engine sensor probes.
What must be verified on the exterior of the aircraft with respect to the engine, prior to engine start during cold weather operations?
(Ref. SOPM Ch. 4)
COLD WEATHER OPERATIONS
Do not start the engine until
- freedom of N1 fan rotation is verified
- all ice deposits are removed from the air inlet.
- Water may freeze in the area of the lower intake, jamming the adjacent fan blades.
- Under no circumstance is it permissible to use deicing/anti-icing fluid for the removal of the contaminant.
After establishing AC power, the Captain notices that the Electrical PBIT was never initiated. What would prohibit it from running?
(Ref. SOPM CH. 4)
- Electric PBIT Stops Running
- Any interruption on AC power
- Push any flight control switches (elevator, rudder, spoilers)
- Turn on any hydraulic pump.
What would be an appropriate action by the crew should the Electrical PBIT fail to run?
(Ref. SOPM Ch. 4)
Contaminated smart probes (ice, snow, or deice/ anti-ice fluid)
- AC Power is established
- verify the pushbutton illuminates.
- ADSP Heater Switch ……………ON
- Flight Control PBIT………………….ACCOMPLISH
• Verify the clock on the Flight Control Synoptic page resets to 50 hours after the flight control PBIT is complete.
- PBIT Fails to run
Ground Reset
- leave the aircraft powered for 3 minutes
- ADSP Heater Switch on.
- Power down Aircraft
- wait one minute, and
- power the aircraft back up using the normal procedures for establishing electrical power.
- -The flight control PBIT should now run properly.
ADSP Heater Switch …………………OFF
After heating the ADSPs, ensure there is no airspeed indication on both PFDs and all spurious AFCS and ADS EICAS messages are no longer displayed.
When is a hydraulic warm-up test required?
(Ref. SOPM Ch. 4)
-18°C
Assuming a single engine taxi with the APU off, will heat be applied to the windshield?
(Ref. AOM Vol. 2)
GROUND OPERATION
When a single AC power is available (e.g. one IDG) each windshield heating controller performs its standard power-up BIT routine heating the corresponding windshield for 120 seconds.
What is the maximum speed while taxiing straight ahead on a contaminated taxiway? Where is your ground speed shown?
(Ref. SOPM Ch. 4)
MAXIMUM TAXI SPEEDS
Straight / DRY………………………………………….30kt
Straight / WET or CONTAMINATED……….10kt
Turns / DRY………………………………………………10kt
Turns / WET or CONTAMINATED……………5kt
If both ice detector probes fail do we have ice protection? If so, how?
(Ref. AOM Vol. 2) 14-12-10
ICE DETECTORS
ABNORMAL OPERATION
In case of a dual ice detector failure, the anti-ice operation is only possible in the manual mode.
When is a runway considered to be contaminated?
(Ref. DPM Ch. 7)
SOPM 06-01.4 of 12
contaminated runway
A runway is considered contaminated when more than 25% of the runway surface area (whether in isolated areas or not), within the reported length and width being used, is covered by more than 1/8 in (3 mm) of standing water or its equivalent in slush, wet snow, dry snow, or any depth of ice or compacted snow.
With a runway RCC value of 4/4/3 listed on the current ATIS, should we utilize the maximum performance landing technique? If so what is that consisted of?
(Ref. SOPM Ch. 4)
LANDING ON WET, SLIPPERY, OR CONTAMINATED RUNWAYS
To minimize stopping distance on a contaminated runway:
• Consider using Maximum Performance Landing techniques
MAXIMUM PERFORMANCE LANDING
To minimize landing distance, consider the following techniques:
• Use FULL Flaps
• Cross the threshold at screen height of 50 ft and VREF
• Avoid extended flare
• Apply maximum thrust reverse. When necessary, the thrust reversers may be used until the airplane comes to a complete stop.
• Immediately after the main landing gear wheels have touched down, apply firm and steady maximum manual brakes and hold pedal pressure until the airplane decelerates to a safe taxi speed within the runway
• Lower nosewheel immediately
NOTE: The same technique could be used for Flaps 5 configuration, but the landing distance will increase accordingly.
What is the difference between a pretakeoff check and a pretakeoff contamination check?
(GDPM Ch 4)
6) take off must occur within five minutes of the completion of the Pre takeoff Contamination Check.
7) The Pretake off Contamination Check is performed from inside the cabin.
Pretake off Check The flight deck crew must not rely on the use of the HOT as the sole determinate that aircraft surfaces are free from frozen contaminates. Several PreTakeoff checks may be required during the HOT to determine the condition of the aircraft prior to takeoff.
