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 4)  All of the deicing/anti-icing fluid on the cockpit windows must be removed before the departure. Carefully examine the windows with the wipers installed. Also, examine the forward areas where the fluid can flow aft on the windshield during the taxi and takeoff. These areas must be clear before the departure.
Engines and APU
 WARNING: PERSONS MUST STAY CLEAR OF THE DANGEROUS AREAS IN
_______ FRONT OF OR IN BACK OF AN ENGINE (AMM 71-00-00) AND IN THE APU EXHAUST (CHAPTER 49) WHEN THEY OPERATE. INJURY OR DEATH OF PERSONS CAN OCCUR IN THESE AREAS.
 1)  For the safety of persons, do not operate the engines or the APU during the ice removal/anti-icing operations. But, if it is necessary to do the ice removal/anti-icing procedure during engine and/or APU operation, do the steps that follow: a) Make sure the engine and/or the APU is at idle speed. b) Do not point the spray of deicing/anti-icing fluids
 directly into the engine and/or APU inlet.
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747-400 MAINTENANCE MANUAL
 CAUTION: MAKE SURE THE APU INLET AREA IS CLEAR BEFORE YOU
_______ START THE APU. DAMAGE TO THE APU CAN OCCUR FROM THE ICE OR SNOW THAT COLLECTED IN THE INLET AREA.
 2) If the engines/APU are on, do the steps that follow. a) Close the valves for the air conditioning pack and Bleed Valves to the cabin.
 NOTE: This will keep the fumes out of the cabin when
____ you apply deicing/anti-icing fluid in the area of the engines/APU inlets.
 3)  Do not point a spray of deicing/anti-icing fluid directly into the areas below: a) The inlet ducts for the engine or APU b) Exhausts c) Engine thrust reversers d) Engine inlet e) Probes attached to the strut f) Engine bleed air ducts.
 (e) Brakes
 1)  When deicing or anti-icing the airplane, protect the wheels and brakes from fluid contamination with the methods below: a) Do not direct a spray of deicing or anti-icing fluids
 at the wheels or brakes.
 NOTE: Carbon brakes which have been intentionally
____ soaked with deicing or anti-icing fluids should be removed and decontaminated per the procedures found in the applicable supplier's component maintenance manual.
 b)  Use suitable covers on the wheels and brakes when operationally feasible.
 c)  Apply the parking brake to reduce incidental contamination of brake friction surfaces when operationally feasible.
 NOTE: The brakes do not need to be re-applied if the _
____ wheels have not rotated since the last brake application.
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747-400 MAINTENANCE MANUAL
 2)  Manually remove snow or ice accumulation from the wheels, brakes or tires. A hot air blower may be used for this purpose.
 (f) Landing Gear and Doors 1) Make sure there is not a layer of ice and/or snow on the movable parts and the position indication switches for the landing gear. This could prevent the correct operation of the landing gear. Make sure you do not remove lubricants or make the lubricants thinner when you apply deicing/anti-icing fluids. Parts that are not lubricated can seize or not operate without the correct servicing.
 2)  Remove the ice and snow from these areas:
 a) The landing gear doors
 b) The door latches
 c) The uplock mechanism
 d) The uplock hook
 e) The downlock mechanism
 f) The bungee springs
 g) The lock actuators
 h) The position indication switches.

 NOTE: It is the airline's decision to apply or not
____ apply anti-icing fluid as protection after the ice is removed.
 3)  Make sure that ice did not collect on the steering cables for the nose wheel. Remove the ice if it is necessary.
 4)  Examine the alternate extend system for ice that has collected in these areas that are open and not heated: a) The landing gear alternate extension system control
 cables and mechanism b) The external mechanism for the landing gear.
　
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