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757 MAINTENANCE MANUAL
 6)  Remove all of the ice or snow from the door and girt bar areas before you close a door.
 7)  Do not open the cargo doors if it is not necessary. Remove the ice and snow from the cargo containers before you put them on the airplane. Before the doors are closed for flight, put anti-icing fluid on these areas: a) The pressure relief doors b) The lower doorsills c) The bottom edge of the door.
 8)  Do not use hard or sharp tools to remove the ice from the airplane surface.
 9)  The right and left sides of the wing and horizontal stabilizer must get the same and full ice removal/anti-icing procedure.
 10) Remove all of the deicing/anti-icing fluid from the cockpit windows before the departure. Make sure you carefully examine the windows with the wipers installed. Make sure that fluid is removed from all the forward areas where it can flow back on the windshields during the taxi and takeoff. These areas must be clean before the departure.
 11) After the ice removal/anti-icing procedure has been done many times, you must examine the areas and holes where there is less or no aerodynamic flow. Look for remaining deicing/anti-icing fluids in the areas such as balance bays and wing and stabilizer rear spars.
 (n)  When there is slush on the runways, examine the airplane when it gets to the ramp. Look for slush that collected on the airplane or damage to the airplane surfaces. 1) Examine the areas that follow for ice that collected and
 damage to the skin panels (remove the ice if it is necessary): a) The leading edges b) The flaps c) The flap wells d) The vertical stabilizer e) The rudder f) The bottom and the top surfaces of the horizontal
 stabilizers and elevators. 2) Examine the wheel well areas for ice, slush and snow that collected. Remove the ice if it is necessary. 3) Examine the skin panels behind the wheel wells for damaged edges.
 (o)  Make sure the concentration of the deicing/anti-icing fluid is correct before you apply it to the airplane.
 WARNING: DO NOT WALK ON THE WINGS OR THE HORIZONTAL STABILIZER.
_______ ICE OR SNOW ON THESE SURFACES IS NOT SAFE. MAINTENANCE PERSONS CAN FALL WHICH MAY CAUSE PERSONAL INJURY OR AIRPLANE DAMAGE.
 (p)  Use a boom truck or a cherry-picker to do deicing/anti-icing.
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
757
MAINTENANCE MANUAL

 S 663-104
 CAUTION: THE REPEATED APPLICATION OF TYPE II AND TYPE IV
_______ DEICING/ANTI-ICING FLUIDS, WITHOUT THE SUBSEQUENT APPLICATION OF TYPE I DEICING/ANTI-ICING FLUID OR HOT WATER, MAY CAUSE RESIDUE TO COLLECT IN AERODYNAMICALLY QUIET AREAS. THIS RESIDUE MAY REHYDRATE AND FREEZE UNDER CERTAIN TEMPERATURE, HIGH HUMIDITY AND/OR RAIN CONDITIONS. THIS RESIDUE MAY BLOCK OR IMPEDE CRITICAL FLIGHT CONTROL SYSTEMS. THIS RESIDUE MAY REQUIRE REMOVAL.
 (2) Specific Requirements
 (a) Control Surfaces
 1)  Retract the wing flaps, slats, and spoilers during icing conditions or when the snow falls. If it is necessary to operate these controls, make sure they are not blocked by ice or snow before you retract them.
 NOTE: If an airplane comes to the gate with the flaps not
____ fully retracted during icing conditions or when the snow falls, examine these flaps that are not fully retracted. Look for ice or snow that has collected before they are retracted.
 2)  All of the control surfaces must have no ice, snow, or frost on them. After you remove the ice, make sure there is no moisture collected in the hinges, guide tracks and actuators for the flight controls. This moisture could subsequently freeze. Apply deicing/anti-icing fluid for protection.
 3)  Open the leading edge devices and look for ice or snow.
 (b) Wing and Horizontal Tail Surfaces
 CAUTION: BE CAREFUL WHEN YOU REMOVE THE ICE AND SNOW FROM THE
_______ WING AND TAIL SURFACES NEAR THE VORTEX GENERATOR. IF YOU ARE NOT CAREFUL, YOU CAN CAUSE DAMAGE TO THE VORTEX GENERATORS.
　
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