(g)
Close lighting circuit breaker INDICATOR LTS MASTER DIMMING BUS and master caution bus circuit breakers FUEL, ANNUNCIATOR NO. 1, and BAT on P6 panel.
(h)
Ensure that all circuit breakers are open in systems having master caution annunciator lights on cockpit lightshield (Fig. 501).
(i)
If MASTER CAUTION and system annunciator lights are illuminated, depress either right or left MASTER CAUTION light. Check that all lights extinguish.
(j)
Close fuel system circuit breakers on P6 panel: FWD BOOST PUMP TANK 1, FWD BOOST PUMP TANK 2, AFT BOOST PUMP TANK 1, AFT BOOST PUMP TANK 2, BOOST PUMP CTR TANK LEFT, BOOST PUMP CTR TANK RIGHT, ENG 1 SHUT-OFF VALVE, ENG 2 SHUT-OFF VALVE, and MANIF VALVE.
(k)
Pull engine fire switches on aft electronic panel (P8) to FIRE position to close engine fuel shutoff valves.
(l)
Check that tank No. 1 and 2 boost pump LOW PRESSURE indicating lights on the forward overhead panel P5 are illuminated (Fig. 501).
(m)
Press either MASTER CAUTION light. Check that FUEL annunciator and MASTER CAUTION lights go off and boost pump LOW PRESSURE indicator lights stay on.
(n)
Press FUEL annunciator light and check that FUEL annunciator and MASTER CAUTION lights come on.
(o)
Close master DIM AND TEST circuit breaker on P6 panel.
(p)
Put the LIGHTS switch on overhead panel P2 in DIM position. Check that MASTER CAUTION, FUEL annunciator, and boost pump LOW PRESSURE indicator lights dim.
(q)
Put the LIGHTS switch in BRT position. Check that lights return to original brightness.
(r)
Press-to-test center tank boost pump LOW PRESSURE indicating lights on forward overhead panel P5. Make sure the bulbs come on.
(2)
Test of the Fuel Boost Pump
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(a) Put the tank No. 1 FWD boost pump switch on P5 panel in ON position.
1) To operate any of the fuel boost pumps, you must be in the flight compartment to continuously monitor the fuel quantity and the low pressure indication in the fuel tank.
WARNING: DO NOT OPERATE ANY FUEL BOOST PUMP IF THE LOW PRESSURE LIGHT COMES ON AND STAYS ON. FUEL VAPORS IN THE TANK MAY IGNITE AND CAUSE A FIRE OR EXPLOSION.
a) Immediately put the applicable fuel boost pump switch(es) to OFF if the LOW PRESSURE light comes on and stays on.
NOTE: When defueling or transferring fuel with minimum backpressure to the pumps, it is possible for the low pressure light(s) to be on. In this case, monitor the tank quantity and put the pump switch(es) to OFF if the tank quantity is not changing.
(b)
Check for fuel pressure buildup and verify by noting that pump LOW PRESSURE indicating light on P5 panel goes off. If light does not go off, refer to fuel boost pump reprime procedure (AMM 28-22-41/401).
(c)
When pump LOW PRESSURE indicating light goes off, return FWD boost pump switch to OFF position. Make sure the indicating light comes on.
(d)
Repeat steps (a) thru (c) for tank No. 1 AFT boost pump and tank No. 2 FWD and AFT boost pumps with only one pump operating at a time.
(e)
Open BOOST PUMP CTR TANK RIGHT circuit breaker on P6 panel.
(f)
Put R CTR tank fuel boost pump switch in ON position.
(g)
Check that pump LOW PRESSURE indicating light comes on.
(h)
Close BOOST PUMP CTR TANK RIGHT circuit breaker.
(i)
Check for fuel pressure buildup and verify by noting that pump LOW PRESSURE indicating light on P5 panel goes off. If light does not go off, put the boost pump switch to the OFF position and refer to fuel boost pump reprime procedure (AMM 28-22-41/401).
(j)
When pump LOW PRESSURE indicating light goes off, return R CTR tank fuel boost pump switch to OFF position. Check that indicating light stays off.
(k)
Repeat steps (e) thru (j) for L CTR tank fuel boost pump.
(l)
Place all six fuel boost pump switches on P5 panel in ON position.
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1) To operate any of the fuel boost pumps, you must be in the flight compartment to continuously monitor the fuel quantity and the low pressure indication in the fuel tank.
WARNING: DO NOT OPERATE ANY FUEL BOOST PUMP IF THE LOW PRESSURE LIGHT COMES ON AND STAYS ON. FUEL VAPORS IN THE TANK MAY IGNITE AND CAUSE A FIRE OR EXPLOSION.
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