Weather Radar Test
Weather Radar TEST switch.............................................................Push
ND Mode selector............................................................................MAP
EFIS WXR switch ............................................................................Push
Verify radar test pattern displays on ND. EFIS WXR switch ............................................................................Push Select Captain’s and First Officer’s weather radar displays off. Desired Mode switch ........................................................................Push
Copyright . The Boeing Company. See title page for details.
October 1, 2000 D6-30151-425 SP.11.1
Supplementary Procedures -Flight Management, Navigation 747 Operations Manual
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Copyright . The Boeing Company. See title page for details.
SP.11.2 D6-30151-425 October 1, 2000
747 Operations Manual
Fuel Balancing
Excessive fuel imbalance adversely affects CG, aerodynamic drag, and therefore, fuel economy. To maintain CG and reduce drag, operate the airplane within limits of FUEL IMBALANCE EICAS advisories.
Fuel may be balanced:
.
between main tanks 1 and 4 by opening crossfeed valves 1 and 4,
closing crossfeed valves 2 and 3, turning off the fuel pumps in the
low tank, and turning off the override pumps in main tanks 2 and 3
.
between main tanks 2 and 3 by turning off the fuel pumps in the
low tank
.
longitudinally by opening all crossfeed valves and turning off the
fuel pumps in the low tanks. Avoid conditions which require fuel suction feed, unless directed by published non-normal procedure.
The fuel system should be returned to normal operating condition when the imbalance condition has been corrected or prior to landing.
Copyright . The Boeing Company. See title page for details.
October 1, 2000 D6-30151-425 SP.12.1
Supplementary Procedures -Fuel 747 Operations Manual
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Copyright . The Boeing Company. See title page for details.
SP.12.2 D6-30151-425 October 1, 2000
747 Operations Manual
Introduction
Airplane operation in adverse weather conditions may require additional considerations due to effects of extreme temperatures, precipitation, turbulence, and windshear. Procedures in this section supplement normal procedures and should be observed when applicable.
The following recommendations apply to adverse weather operations in general:
.
do not use reduced thrust (assumed temperatures) for takeoff on a
contaminated runway, or if windshear conditions are suspected
.
V1 may be reduced to minimum V1 (assuming all weight
limitations are considered) for increased stopping distance
performance
.
takeoffs on slippery runways are not recommended if the
crosswind exceeds 15 knots or when slush or wet snow is more
than 1/2 inch (13mm) in depth
.
improved stall margins can be achieved by the following:
.
if excess runway is available, consider using improved climb procedures for flaps 20
.
if runway is limited for the planned takeoff flap setting, consider using the next greater flap position with improved climb performance. This provides additional stall margins with minimum performance penalties
Cold Weather Operation
Considerations associated with cold weather operation are primarily concerned with low temperatures and with ice and snow on the airplane, ramps, taxiways and runways.
Icing conditions exist when TAT is 10°C (50°F) or below and:
.
visible moisture (clouds, fog with visibility less than one mile, rain,
snow, sleet, ice crystals, and so on) is present, or
.
standing water, ice, or snow is present on the ramps, taxiways, or
runways.
CAUTION: Do not operate nacelle or wing anti–ice when total air temperature (TAT) is above 10°C (50°F).
Copyright . The Boeing Company. See title page for details.
December 01, 1999 D6-30151-425 SP.16.1
Supplementary Procedures -Adverse Weather 747 Operations Manual
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