787 Flight Crew Operations Manual
DO NOT USE FOR FLIGHT
Supplementary Procedures -
Adverse Weather
Copyright © The Boeing Company. See title page for details.
D615Z003-TBC SP.16.3
Pitot probes and static ports ........................................................... Check
Verify that all pitot probes and static ports are free of snow and ice.
Water rundown after snow removal may freeze immediately
forward of static ports and cause an ice buildup which disturbs
airflow over the static ports resulting in erroneous static readings
even when static ports are clear.
Air conditioning inlets and exits.................................................... Check
Verify that the air inlets and exits, including the outflow valves, are
free of snow and ice.
Engine inlets .................................................................................. Check
Verify that the inlet cowling is free of snow and ice.
Fuel tank vents ............................................................................... Check
Verify that all traces of ice and frost are removed.
Landing gear doors ........................................................................ Check
Landing gear doors should be free of snow and ice.
APU air inlets ............................................................................... Check
The APU inlet door must be free of snow and ice before APU start.
Engine Start Procedure
Do the normal Engine Start Procedure with the following considerations:
• Oil pressure may be slow to rise
• Initial oil pressure rise may be higher than normal
• Additional warm-up time may be needed to allow oil temperature
to reach the normal range
• Displays may require additional warm-up time before displayed
engine indications accurately show changing values. Displays may
appear less bright than normal
February 13, 2009
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