Learn Boeing 747-8 fuel management in MSFS 2020: calculate and load block fuel, set pumps, monitor tanks, and fix imbalance or starvation.
In MSFS 2020, manage the Boeing 747-8's fuel by loading a calculated block fuel before departure, keeping the tank distribution symmetrical, configuring pumps and crossfeeds from the checklist, and following EICAS fuel messages as tanks empty. Monitor destination fuel in the FMC; it should remain above the reserve entered on PERF INIT.
How should you calculate and load 747-8 fuel?
Load block fuel, not merely the estimated trip burn or an arbitrary tank percentage. Block fuel includes taxi, trip, contingency, alternate, final reserve and any operational extra; our block-fuel calculation guide explains what belongs in each part.
- Set the payload first. Passengers and cargo determine how much fuel can be carried without exceeding maximum take-off weight.
- Calculate the block fuel. Account for the route, forecast wind, cruise level, alternate and expected ground use.
- Load fuel before departure. Use the world-map
Weight and Balancecontrols, the toolbar fuel panel or the aircraft's loading interface. Avoid changing fuel after engine start unless correcting a simulator problem. - Check tank distribution. Keep the left and right sides paired: main tank 1 should broadly match 4, while 2 should match 3. This does not mean every main tank must contain the same quantity; the inboard tanks can carry more under the normal loading schedule.
- Verify the FMC. Confirm gross weight, zero-fuel weight and sensed fuel on
PERF INIT, then enter reserve fuel rather than total block fuel. Read the displayed unit carefully because Boeing FMC quantities may be abbreviated in thousands.
A full fuel load combined with a heavy payload can put the aircraft over its weight limits. Check both departure weight and predicted landing weight instead of assuming that 100 per cent fuel is acceptable.
What do the 747-8 fuel tanks do?
The main tanks ultimately feed their corresponding engines, while centre, reserve and stabilizer fuel extend range and transfer into the normal feed system.
| Tank group | Normal purpose | What the pilot watches |
|---|---|---|
| Main tanks 1 to 4 | Primary engine-feed tanks | Left-right balance, pump status and the eventual tank-to-engine configuration |
| Centre wing tank | Additional long-haul fuel | Its high-pressure pumps normally make centre fuel feed before main-tank fuel |
| Reserve tanks 2 and 3 | Additional wing fuel | Automatic transfer into main tanks 2 and 3 as their levels fall |
| Stabilizer tank | Extra capacity on large fuel loads | Automatic transfer at the appropriate stage; it is not a manual balancing tank |
The stock MSFS 2020 747-8 and third-party modifications can differ in how completely they simulate transfers, advisories and fuel jettison. Use the individual tank indications and EICAS messages shown by the aircraft you are actually flying.
Which fuel pumps and crossfeeds should be on?
Before engine start, the occupied main tanks need their pumps on, while centre, override and transfer controls must match the fuel actually loaded.
- Turn on the main-tank pumps. All four main tanks normally contain usable engine-feed fuel. A pump for an empty tank should not be left running.
- Configure the extra tanks. If centre or stabilizer fuel is carried, place the associated pump or transfer switches in their normal checklist positions. Main 2 and 3 override pumps support the common manifold during the high-capacity feed phase.
- Set the crossfeed manifold. With a normal long-haul load, the crossfeeds are initially open so the higher-pressure centre or inboard supply can feed all four engines. Do not close every crossfeed at the start merely because each engine eventually uses its corresponding main tank.
- Move each fuel control switch to RUN during its engine start. A pump cannot supply an engine whose fuel control remains at cutoff.
When starting from a powered-down cockpit, follow our 747-8 cold-and-dark engine-start sequence so the electrical, pneumatic and fuel systems are configured in the right order.
How do you monitor fuel during the flight?
Compare actual tank quantities and total fuel against the FMC's predicted destination fuel throughout the flight.
- EICAS fuel quantity: Check total fuel, individual tank levels and any growing left-right difference.
- FMC progress page: Compare predicted fuel at destination with the reserve entered on
PERF INIT. - Fuel flow and fuel used: A sudden change can indicate an engine setting, configuration problem or simulator failure.
- Gross weight: Confirm that the expected arrival weight remains within the aircraft's landing limit.
If the destination prediction falls unexpectedly, check for a route discontinuity, incorrect cruise altitude, stronger headwind, prolonged low-level flight or excessive speed. Do not solve a bad FMC prediction by adding fuel until the route and performance entries have been checked. The Unlimited Fuel assistance option should also be disabled when practising realistic management.
Which EICAS fuel messages require action?
EICAS messages tell you when the fuel system has reached a changeover point or when a pump is no longer receiving fuel.
| Indication | Normal response |
|---|---|
FUEL LOW CTR L or FUEL LOW CTR R | Switch off the indicated centre pump as directed by the checklist; leaving a dry pump on produces low-pressure warnings. |
FUEL TANK/ENG | Change to tank-to-engine feed. This normally means switching off the main 2 and 3 override pumps and closing crossfeed valves 1 and 4, while keeping the main pumps operating. |
| Imbalance or main-tank low warning | Check the individual quantities, pump lights, crossfeed configuration and automatic transfer state before moving switches. |
Follow the displayed checklist if its wording differs. Switching pumps and crossfeeds early can drain one group of tanks while leaving otherwise usable fuel isolated elsewhere.
Why can the engines starve when fuel is still aboard?
Fuel starvation with a positive total quantity usually means the remaining fuel is in a tank that is not connected to the engines.
- The centre tank contains fuel, but its pumps are off.
- A main-tank pump is off or has no electrical power.
- The crossfeeds were closed before the aircraft changed to tank-to-engine feed.
- An engine fuel control switch is still at cutoff.
- Fuel was added through the MSFS toolbar but the pump and transfer configuration was not rechecked.
- Fuel was loaded asymmetrically, allowing one engine-feed tank to empty much earlier than its opposite number.
Restore a valid fuel source first, then use the aircraft's engine-relight checklist if an engine has stopped. Do not randomly toggle every fuel switch; on a four-engine manifold that can hide the original fault or isolate another engine.
How do you correct a fuel imbalance?
Correct a loading imbalance on the ground whenever possible. In flight, the general principle is to use the heavy side to supply more engines through the crossfeed manifold while reducing supply from the light side, then restore the normal configuration once quantities are balanced.
Use the aircraft checklist rather than improvising a switch pattern, because reserve and stabilizer transfers may still be active. If the difference continues increasing after the configuration is verified, treat it as a possible leak or simulated failure and plan to land.
Can you add or dump fuel during a flight?
Add fuel in flight only to correct an incorrect setup, a simulator fault or an intentionally simplified session. Make equal changes to paired tanks, then recheck gross weight, centre of gravity, pumps and FMC predictions; our guide to adding fuel safely during an MSFS flight covers the simulator controls and common tank-balance problems.
Fuel jettison is not a routine balancing tool. If the installed aircraft models it, select a sensible fuel-to-remain target and use the proper checklist. For a short return, compare the expected landing weight with the limit before choosing between holding to burn fuel, jettisoning fuel or making an overweight emergency landing.