787 Flight Crew Operations Manual
DO NOT USE FOR FLIGHT
Supplementary Procedures -
Adverse Weather
Copyright © The Boeing Company. See title page for details.
SP.16.8 D615Z003-TBC
Engine Anti-ice Operation - In-flight
Engine anti–ice must be AUTO or ON during all flight operations when
icing conditions exist or are anticipated, except when the temperature
is below –40°C OAT.
CAUTION: Do not use engine anti-ice when OAT is above 10°C.
Manual Use of Engine Anti-ice
When using the engine anti-ice system manually in areas of possible
icing, activate engine anti–ice before entering icing conditions.
WARNING: If using the engine anti–ice system manually, 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.
When manual use of engine anti-ice is needed:
ENGINE ANTI–ICE selectors.................................... ON PM
When manual use of engine anti-ice is no longer needed:
ENGINE ANTI–ICE selectors...............................AUTO PM
August 14, 2009
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