787 Flight Crew Operations Manual
DO NOT USE FOR FLIGHT
Supplementary Procedures -
Adverse Weather
Copyright © The Boeing Company. See title page for details.
SP.16.4 D615Z003-TBC
Engine Anti-ice Operation - On the Ground
Engine anti-ice must be selected ON immediately after both engines are
started 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
When engine anti-ice is no longer needed:
ENGINE ANTI-ICE selectors ...............................AUTO F/O
Before Taxi Procedure
Do the normal Before Taxi Procedure with the following modifications:
If taxi route is through ice, snow, slush or standing water in low
temperatures or if precipitation is falling with temperatures below
freezing, taxi out with the flaps up. Taxiing with the flaps extended
subjects the flaps and flap drives to contamination. Leading edge
devices are also susceptible to slush accumulations.
Call “FLAPS ___” as needed. C
Flap lever................................................ Set flaps, as needed F/O
February 13, 2009
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