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circle distance and bearing to the alternate. Press this key to bring
cursor over destination ident and enter a new ident as an alternate.
The LIST function will present an airport list. An (A) will appear next
to the new destination.
ETA - The estimated time of arrival at the TO waypoint location.
ETA is based upon the present time and the current groundspeed
over the flight planned route. ETA is displayed in terms of UTC and
LCL (local) time. The local time zone difference from the zero
meridian can be entered up to ±13 hours. The ± key is used to
toggle the sign with the cursor over the LCL entry field. The sign will
prefill with a minus (-) when the longitude of the TO waypoint
location is W and prefill with a plus (+) when the longitude is E.
FUEL ONBRD - To the left, under "NOW", is the present fuel on
board the aircraft in pounds. The value is equal to the FUEL
ONBOARD value last entered on FUEL page 1 (on the ground or in
flight) minus the fuel used since that entry was made. To the right,
under "OVHD (DESTINATION)," is the calculated fuel remaining over
the destination based upon present fuel on board, present
groundspeed, and present fuel flow.
ENDURANCE - Under "NOW," the amount of time in hours and
minutes that the flight can continue with the present fuel flow. Under
"OVHD (DESTINATION)," the estimated amount of time the flight could
continue after the destination is reached based upon the calculated
FUEL ON BOARD at that location and present fuel flow.
ENDURANCE is based on using all available fuel on board the
aircraft, including reserves.
RANGE - Under "NOW," the distance in NM that can be traversed
with the present fuel flow, fuel on board and groundspeed. Under
"OVHD (DESTINATION)," the estimated distance in NM which could be
traversed after the destination is reached. This range is based upon
the calculated FUEL ON BOARD at that location, present fuel flow,
and present groundspeed. RANGE is based upon using all fuel on
board the aircraft, including reserves.
Section V
Operations
2423sv602 5-121
Change 1
FUEL Page 3
FUEL page 3 provides a summary of the fuel requirements for the
flight plan. Manual FUEL FLOW and GS (groundspeed) entries may
be made to evaluate their effect on the other parameters displayed.
FUEL FLOW - Cumulative fuel consumption in pounds(kilograms).
Placing the cursor over the FUEL FLOW entry field allows a manual
fuel flow entry to be made. When a manual entry is made, the
performance displayed on this page will be referenced to that value.
GS - The groundspeed expressed in knots. Placing the cursor over
the GS entry field allows a manual groundspeed entry to be made.
When a manual entry is made, the performance displayed on this
page will be referenced to that value.
NOTE: If Fuel Flow or GS are manually entered, these values will
be lost when the fuel mode is exited.
AT DEPARTURE - The total fuel entered on FUEL page 1 prior to
departure. This value will not change if a new fuel entry is made
while airborne.
USED - The total fuel used. USED is set to zero whenever a FUEL
ON BOARD entry is made on FUEL page 1 while on the ground.
ONBOARD - The fuel on board the aircraft is equal to the total FUEL
ON BOARD value last entered on FUEL page 1 (on the ground or in
flight) minus the fuel used since that entry was made.
Section V
Operations
5-122 2423sv602
Change 1
REQUIRED - The estimated fuel required to the destination.
Required fuel is based upon present fuel flow and ETE to
destination.
OVERHEAD - The estimated fuel on board at the destination.
OVERHEAD fuel is equal to ONBOARD minus REQUIRED. The
figure flashes if its value is less than zero.
RESERVES - The total reserves value as entered on FUEL page 1.
EXCESS - Excess fuel at destination. EXCESS is equal to
OVERHEAD minus RESERVES. The figure flashes if its value is
less than zero.
FUEL Page 4
This FUEL Page displays projected landing weight based upon
current fuel conditions. All fuel quantity and gross weight displays
are computed values based upon the initial values input by the pilot
and inputs from the engine fuel flow sensors. The values displayed
on this page may not be changed and the line select keys have no
function.
GROSS WT - The current gross weight of the aircraft is based on
zero fuel weight plus present fuel on board.
FUEL ONBOARD - The current fuel on board is calculated from the
last fuel on board entry and fuel flow inputs subsequent to that entry.
LANDING WT - The landing weight is based on current gross weight
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