(2)
AMM 28-11-02/401, Reserve and Main Tank Access Door
(3)
AMM 28-26-00/201, Defueling
(4)
AIPC 28-22-08, Fig. 1
B.
Access
(1)
Location Zones 541 Inbd Main Tank (Part), Front Spar to Mid Spar, Left 543 Outbd Main Tank (Part), Front Spar to Mid Spar, Left 544 Inbd Main Tank (Part), Mid Spar to Rear Spar, Left 546 Outbd Main Tank (Part), Mid Spar to Rear Spar, Left 641 Inbd Main Tank (Part), Front Spar to Mid Spar, Right 643 Outbd Main Tank (Part), Front Spar to Mid Spar, Right 644 Inbd Main Tank (Part), Mid Spar to Rear Spar, Right 646 Outbd Main Tank (Part), Mid Spar to Rear Spar, Right
(2)
Access Panels
544AB Fuel Tank Access Door
546AB Fuel Tank Access Door
644AB Fuel Tank Access Door
646AB Fuel Tank Access Door
C.
Procedure
(1)
Defuel the applicable main fuel tank (AMM 28-26-00/201).
S 654-002
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A
747-400
MAINTENANCE MANUAL
S 864-017
WARNING: CAREFULLY DO ALL THE SAFETY PROCEDURES TO DEFUEL AND TO GO INTO
_______ THE FUEL TANKS. INJURY TO PERSONS AND DAMAGE TO EQUIPMENT CAN OCCUR IF YOU DO NOT OBEY THE SAFETY PROCEDURES.
(2)
Purge and prepare to go into the fuel tank (AMM 28-11-00/201).
S 014-004
(3)
Remove additional fuel tank access doors, if it is necessary, to get access to the ejector pump (AMM 28-11-02/401).
S 864-005
(4)
Go into the fuel tank (AMM 28-11-00/201).
S 034-006
(5)
Disconnect the coupling on the pressure line at the motive port and the coupling on the water suction line at the induced port.
S 034-019
(6)
On the forward ejector pump in the No. 1 and No. 4 main tanks, disconnect the coupling on the discharge line at the discharge port.
S 034-018
(7)
Discard the O-rings.
S 034-007
(8)
Remove the bolts, washers, and nuts (2 locations) that attach the ejector pump to the mounting bracket.
S 034-025
(9)
Move the bonding jumper to one side.
S 024-020
(10)
Remove the ejector pump.
TASK 28-22-08-404-009
3. Water Scavenge Ejector Pump Installation (Fig. 401)
________________________________________
A. Equipment
(1)
Air supply, 0 to 100 psig
B.
Consumable Materials
(1)
D00128 Petrolatum - Technical, VV-P-236
(2)
B00316 Solvent - Aliphatic Naphtha, TT-N-95, Type I
C.
References
(1)
AMM 20-11-15/401, Bonding Jumpers and Ground Leads
(2)
AMM 20-22-01/601, Electrical Bonding
(3)
AMM 28-11-00/201, Fuel Tanks
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A
747-400
MAINTENANCE MANUAL
WATER SCAVENGE EJECTOR PUMP
SEE A
INDUCED PORT BONDING JUMPER BOOST PUMP PICKUP
MOTIVE PORT EJECTOR PUMP A A
(2 LOCATIONS) BOLTS
JET NOZZLE DISCHARGE PORT A WATER SCAVENGE EJECTOR PUMP
A-A
Water Scavenge Ejector Pump Figure 401
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