FUEL page

Open it from the MENU (B1 then FUEL) or from the top row of any other aircraft page. Both crew stations share the same fuel system, so a change made on one seat’s FUEL page shows on the other’s.

1. 1Forward cell Fuel in the forward cell, in pounds.
2. 2Aft cell Fuel in the aft cell, in pounds.
3. 3Engine 1 feed Drawn bold while fuel flows from the forward cell to engine 1.
4. 4Engine 2 feed Drawn bold while fuel flows from the aft cell to engine 2.
5. 5Transfer pump Current transfer mode. L4 opens the mode menu.
6. 6Boost pump Toggled with R2.
7. 7Crossfeed The boxed mode is active. Select with R3 to R5.
8. 8Internal fuel Forward and aft cells combined. A TOT line is added when external tanks are fitted.
9. 9Calculated flow Fuel flow per engine and in total, pounds per hour.
10. 10Endurance Time left on internal fuel at the current flow, in hours and minutes.
11. 11SFR Specific fuel range. Blank on the ground or with no fuel flow.
12. 12Fuel type Always JP8.

Buttons

Button	Label	Action
T2	FLT	Opens the FLT page.
T3	FUEL	This page.
T4	PERF	Opens the PERF page.
T6	UTIL	Opens the aircraft UTIL page.
L1	L AUX	Left external tanks on or off. Shown with tanks on station 1 or 2. Can only be turned on while one of them holds fuel.
L2	C AUX	Internal auxiliary tank transfer on or off. Shown with the tank fitted.
L4	XFER	Opens the transfer pump menu on L1 to L4: FWD, OFF, AFT, AUTO.
R1	R AUX	Right external tanks on or off (stations 3 and 4).
R2	BOOST	Boost pump on or off. Turning it on also sets crossfeed to AFT; turning it off returns crossfeed to NORM.
R3–R5	FWD NORM AFT	Crossfeed mode. Locked while the boost pump is on.
B1		MENU.
B6	CHECK	Opens or closes the fuel check.

Fuel cells and feed

The aircraft carries fuel in a forward and an aft cell. With crossfeed in NORM, engine 1 draws from the forward cell and engine 2 from the aft cell, and the feed lines are drawn bold while fuel is flowing.

FWD and AFT crossfeed feed both engines from one cell. Use them to balance the cells, or to keep an engine running from the other cell after damage.

A cell quantity turns yellow below 240 lb (forward) or 260 lb (aft), and is replaced by a white E when the cell is empty. Low fuel also raises the FWD FUEL LO or AFT FUEL LO caution.

Transfer pump

L4 replaces the left-side labels with the transfer menu. Pick a mode to close it:

• FWD and AFT pump fuel from one cell into the other. The line between the cells animates in the direction of flow.
• AUTO keeps the two cells balanced, moving fuel towards whichever cell is lighter.
• OFF stops transfer.

External and auxiliary tanks

External tanks are fitted to the wing stations from the pylon loadout (see Rearm and refuel). When any are fitted the page draws them on the wings, adds the L AUX and R AUX switches and shows a TOT line for total fuel and total endurance. A side’s switch turns itself off when its tanks run dry.

Fuel check

B6 CHECK opens the fuel check. It measures your real burn rate over a set time and works out when you will run out.

1. Choose the length of the check: R2 15, R3 20 or R4 30 minutes.
2. Press R5 START. The start time is recorded in local time.
3. Close the check with B6 if you need the page. A running check carries on in the background.
4. When the time is up, or when you press R5 STOP, the page shows the elapsed time, burn rate in pounds per hour, the burnout time, and the times by which you must land to keep a 20 minute (VFR) or 30 minute (IFR) reserve. If neither crew station has the check open when it finishes, a FUEL CHECK advisory tells you the results are ready.

Starting a new check clears the previous results.