28-41-00
ú CONFIG ú 11 Page 9 ú Sep 28/00
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MAINTENANCE MANUAL
(2)
When you put the FUEL QTY test switch in the FUEL QTY position and release:
(a)
The left, center, and right fuel quantity indicators on the overhead panel, P5 will show 88.8.
(b)
The total fuel quantity indicator on the P5 panel will show
188.8.
(c)
The fuel temperature indicator on the P5 panel will show -188.
(d)
The FUEL CONFIG light on the P5 panel will come on.
(e)
The EICAS caution message, LOW FUEL, will show on the top display.
(f)
The EICAS status message, FUEL QTY IND, will show on the bottom display.
(g)
The EICAS status message, FUEL QTY CHANNEL, will show on the bottom display.
(h)
The EICAS maintenance message, FUEL QTY BITE, will show on the bottom display.
NOTE: In order to view the EICAS maintenance message FUEL QTY
____ BITE, you must put the FUEL QTY test switch in the FUEL QTY position and release. Then you must immediately push and release the ECS MSG switch on the right side panel, P61.
(3)
The FUEL QTY test switch also does a test of the two ARINC buses A and B. The fuel quantity indicator gets the fuel quantity information from one of the two ARINC buses A and B. If one or two of the ARINC busses is inactive, "-A.-", "-b.-" or "-A.b" will show on the displays of the fuel quantity indicators before the displays show the quantity of usable fuel in the fuel tanks if only one bus is bad. If both busses are bad "-A.b" will show and then the indicators will blank.
(4)
If one of the fuel quantity indicators is blank because there is a fault in the FQIS, the indicator will go off again after you use the fuel quantity test switch. Do the BITE procedure (FIM 28-41-00/101) to find the fault and do the corrective action.
(5)
Once the FUEL QTY test switch is used, if you use the the FUEL QTY test switch again, before the test is complete, nothing will occur.
F. Load Select Indicator (LSI) (Fig. 6)___________________________
(1) One load select indicator (LSI), found on the fueling control panel, P28, monitors each fuel tank (three total).
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. GUN 011-999 ú
28-41-00
ú CONFIG ú 11 Page 10 ú Sep 28/00
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MAINTENANCE MANUAL
(2)
There are two light-on-dark LCD's for each load select indicator. The top display shows the fuel quantity in each fuel tank in LBS (KGS) x 1000. The bottom display shows the fuel quantity selected to be put into the fuel tank in LBS (KGS) x 1000. A 7-1/2 watt, automatically controlled heater makes sure the LCD's will operate correctly in cold weather. Power is applied to the load select indicators whenever the fueling station door is opened, unless the power is supplied by the battery.
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