GOL 737-8, Руководство по эксплуатации

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737 MAX Flight Crew Operations Manual
Flight Management, Navigation -
Flight Management Computer
11.32.6 MN-FLT-OH-201
The FMC continually computes the amount of fuel that will remain when the
destination airport is reached if the active route is flown. The Engine Display
advisory message INSUFFICIENT FUEL is displayed if the fuel remaining at
destination is less than 900 kg.
The USING RESERVE FUEL Engine Display Advisory message is displayed
when a change in flight conditions or route causes the predicted fuel remaining at
the destination is less than the total fuel on board minus the crew entered reserves
for the active flight plan.
The FUEL DISAGREE, INSUFFICIENT FUEL and USING RESERVE FUEL
messages will also show in the CDU scratchpad, illuminate the FMC light as well
as appearing on the Engine Display. Clearing the scratchpad message will
extinguish the FMC light. However, the message will remain (persist) on the
Engine Display until the condition is resolved.
The FMC also provides the trigger logic and indication for the FUEL FLOW (for
engine 1 or engine 2) indication displayed as an MDS Korry light message on the
Engine Display. The light is illuminated when the difference between the
calculated fuel flow and the measured fuel flow exceeds the MEDB defined
threshold and the fuel difference detection has been set continually for five
minutes for either engine.
The scratchpad message VERIFY GW AND FUEL shows if total fuel quantity
data is invalid. The PERF INIT page FUEL line changes to dashes. The FMC uses
the last valid fuel quantity for performance predictions and VNAV operation. The
flight crew should manually enter estimated fuel weight. Periodic fuel weight
update is required for the remainder of the flight to keep gross weight current. The
FMC does not update the manual fuel weight entry. The scratchpad message
VERIFY GW AND FUEL shows again each 30 minutes if subsequent entries are
not performed. The scratchpad message does not show during descent with Vref
selected.
The scratchpad message CHECK FMC FUEL QUANTITY shows if the FMC has
detected an unexpected drop in fuel quantity.
Loss of FMC Electrical Power
The FMC requires continuous electrical power to operate. When the electrical
power is interrupted for less than ten seconds:
• LNAV and VNAV disengage
• all entered data is retained by the FMC
• the FMC resumes normal operation when power is restored.
If power is lost for ten seconds or more on the ground, all preflight procedures and
entries must be done again when power is restored.
March 1, 2021