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or when an accumulation of airframe ice is observed, or when landing
on a runway contaminated with ice, snow, or slush:
Do not retract the flaps until the flap areas have been checked to be
free of contaminates.
Engine anti-ice must be selected ON and remain on during all ground
operations when icing conditions exist or are anticipated, except when
the temperature is below –40°C OAT.
WARNING: Do not rely on airframe visual icing cues before
activating engine anti–ice. Use the temperature and
visible moisture criteria because late activation of
engine anti-ice may allow excessive ingestion of ice
and result in engine damage or failure.
CAUTION: Do not use engine anti-ice when OAT is above 10°C.
When engine anti-ice is needed:
ENGINE ANTI-ICE selectors ....................................ON F/O
Airport
Temp
°C
Height Above Altimeter Source (meters)
60 90 120 150 180 210 240 270 300 450 600 900
0° 5 5 10 10 10 15 15 15 20 25 35 50
-10° 10 10 15 15 20 20 25 30 30 45 60 90
-20° 10 15 20 25 25 30 35 40 45 65 85 130
-30° 15 20 25 30 35 40 45 55 60 85 115 170
-40° 15 25 30 40 45 50 60 65 75 110 145 220
-50° 20 30 40 45 55 65 75 80 90 135 180 270
787 Flight Crew Operations Manual
Supplementary Procedures -
Adverse Weather
Boeing Proprietary SP.16.11
When engine anti-ice is no longer needed:
ENGINE ANTI-ICE selectors ............................... AUTO F/O
When engine anti-ice is required and the OAT is 3°C or below, do an
engine run up, as needed, to minimize ice build-up. Use the following
procedure: C
Check that the area behind the airplane is clear.
Run-up to a minimum of (TBD)% N1 for approximately 1 second
duration at intervals no greater than (TBD) minutes.
Secure Procedure
Do the following steps after completing the normal Secure Procedure:
If the airplane will be attended:
Use normal air conditioning procedures, with all packs, trim air, and
recirculation fans on, to provide cabin heating.
If the airplane will not be attended, or if staying overnight at off-line
stations or at airports where normal support is not available, the flight
crew must arrange for or verify that the following steps are done:
OUTFLOW VALVE switches ................................................... MAN
OUTFLOW VALVE MANUAL switches .............................CLOSE
Position the outflow valves fully closed to inhibit the intake of
snow or ice.
Wheel chocks ..............................................................Verify in place
Parking brake........................................................................ Released
Reduces the possibility of frozen brakes.
Cold weather maintenance procedures for securing the airplane may
be required. These procedures are found in the approved Aircraft
Maintenance Manual.
787 Flight Crew Operations Manual
Supplementary Procedures -
Adverse Weather
SP.16.12 Boeing Proprietary
Hot Weather Operation
During extended ground operations prior to flight deck preparation,
consideration should be given to reducing the heat being generated on the
flight deck. Window heat, radar, and other electronic components which
contribute to a high temperature level on the flight deck may be turned off.
All the flight deck air outlets should be open.
Both packs should be used (when possible) for maximum cooling.
Recirculation fans should be on for maximum cooling capacity. To
maximize the cooling capacity of the air conditioning system, the flight
deck side windows and all doors, including cargo doors, should be kept
closed as much as possible. All gasper outlets should be open and window
shades on the hot (sun–exposed) side of the passenger cabin should be
closed. Flight deck cooling can be improved by closing the flight deck
door and lowering the side trays adjacent to the pilot seats.
Note: If only cooling air from ground air conditioning cart is supplied
(no pressurized air from the APU or ground external air), then
the TAT probe is not aspirated. Because of high TAT probe
temperatures, the FMCs may not accept an assumed
temperature derate. Delay selecting an assumed temperature
derate until after bleed air is available.
787 Flight Crew Operations Manual
Supplementary Procedures -
Adverse Weather
Boeing Proprietary SP.16.13
Severe Turbulence
The turbulent air penetration speed provides ample protection from stall
and high speed buffet, while also providing protection from exceeding the
structural limit.
The recommended procedures for flight in severe turbulence are
　
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