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To verify operation of the spar valve without running engines:
WARNING: DOOR LOCKS MUST BE PROPERLY INSTALLED PRIOR TO ACCESS TO ASSOCIATED SPAR VALVE. RAPID ACTION OF DOORS MAY INJURE PERSONNEL OR DAMAGE EQUIPMENT IF LOCKS ARE NOT PROPERLY INSTALLED.
1. Open applicable left or right main gear door and install door lock (MM 32-00-15).
2. Deactivate the flaps and slats:
A. Depressurize right and center hydraulic systems.
B. Open ALT TE FLAPS circuit breaker on main power distribution panel P6 to deactivate secondary power source to flaps.
3. Gain access to the applicable spar valve.
 
A. For left engine spar valve, open access door 551BB.
B. For right engine spar valve, open access door 651BB (AMM 6-44-00).
4. Open applicable L(R) FUEL COND CONT circuit breaker on panel P6.
5. With ground observer viewing, move the fuel control switch to the RUN position. Cycle the switch between the CUTOFF and RUN position several times to verify proper valve operation.
6. Verify movement of the manual override lever.
7. Restore aircraft to required configuration.
 
ENGINE FUEL SHUTOFF VALVE
 

 
NOTE 1: Subitem 3: Fuel Quantity Densitometers have in the past caused 1) blanking of the flight deck fuel quantity indicators and, 2) fluctuation of flight deck fuel quantity indicators. If a densitometer is inoperative or deactivated, FQIS system with an inoperative densitometer will revert to an internal density standard of 0.81 kg per liter. The system will continually meet accuracy specifications with failed densitometers.
NOTE 2: MEL relief for the following combinations of FQIS and other inoperative equipment may be limited or not allowed. Refer to each MEL item.
FQIS and 28-22-1 Main Tank Fuel Pumps Inoperative: Relief limited or not allowed FQIS and 28-22-2 Center Tank Fuel Pumps Inoperative:Relief limited or not allowed
FQIS and 28-22-5 Automatic Shut Off System Inoperative:Relief not allowed for Subitem 2)a) FQIS and 28-41-2 Fuel Qty Processor Channels Inoperative:Relief not allowed
FQIS and 73-31-1 Fuel Flow Indications Inoperative:Relief not allowed for Subitem 1
EICAS STATUS MESSAGES
FUEL QTY BITE
 
FUEL QTY IND
PLACARD
Fuel Quantity Indicator - TOTAL FUEL QUANTITY INOP
Fuel Quantity Indicator as appropriate - L (R) TANK FQIS INOP or CTR TANK FQIS INOP MAINTENANCE (M)
1. To verify that the Fuel Quantity in associated Tank, accomplish one of the following procedures as appropriate:
A. Check the associated tank fuel quantity indicator on the fuel control P28 panel. If it operates normally, it may be used as the means of determining the quantity in the tank with the inoperative indicator. If it is not operating, placard it inoperative and notify the fuel crew that the automatic fueling shutoff function may be inoperative.
B. Determine the associated tank’s fuel quantity utilizing measuring sticks and the Fuel Measuring Stick Manual provided with the airplane.
　
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