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CDU.................................................................................................... Set
Enter present position on SET IRS POSITION line of position
initialization page.
IRS mode selectors ...........................................................................NAV
IRS High Latitude Alignment
A high latitude alignment must be accomplished when the latitude of the origin
airport is greater than 70°12.0’ and less than 78°15.0’.
IRS Mode selectors ..................................................... OFF, then ALIGN
The IRS Mode selectors must remain in ALIGN for a minimum
of 17 minutes.
CDU ................................................................................................... Set
Enter present position on SET IRS POSITION line of position
initialization page.
IRS mode selectors ...........................................................................NAV
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
October 1, 2000
747 Operations Manual
Copyright © The Boeing Company. See title page for details.
SP.11.2 D6-30151-425
Supplementary Procedures -
Flight Management, Navigation
Intentionally
Blank
October 1, 2000
747 Operations Manual
Supplementary Procedures Chapter SP
Fuel Section 12
Copyright © The Boeing Company. See title page for details.
D6-30151-425 SP.12.1
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.
October 1, 2000
747 Operations Manual
Copyright © The Boeing Company. See title page for details.
SP.12.2 D6-30151-425
Supplementary Procedures -
Fuel
Intentionally
Blank
October 1, 2000
747 Operations Manual
Supplementary Procedures Chapter SP
AdverseWeather Section 16
Copyright © The Boeing Company. See title page for details.
D6-30151-425 SP.16.1
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:
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