28-22-06
ALL ú ú 01 Page 608 ú Feb 18/00
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL
S 436-014
(2) Install the inner and outer teflon sleeve on the wiring for the main
tank fuel boost pump.
S 436-015
(3) Use the cord at the boost pump location to pull the wiring through
the conduit.
S 426-016
(4) Install the clamps and fasteners at each end of the conduit.
NOTE:____ Both sleeves must go through the clamps.
S 216-017
(5)
Inspect the teflon sleeves to make sure both sleeves are visible at each end of the wire bundle installation.
S 426-018
(6)
Connect the electrical connector to the main tank boost pump.
S 866-042
(7)
Close the applicable circuit breaker and remove the DO-NOT-CLOSE tags:
(a)
P180 DC Power Distribution Panel 1) 180E4 FUEL BOOST PMP CONT AFT 1 AND FWD 4 2) 180E19 FUEL BOOST PMP CONT FWD 1 AND AFT 4
(b)
P414 Power Distribution Center - Left 1) 414B5 FUEL BOOST PUMP MAIN AFT 1 2) 414A8 FUEL BOOST PUMP MAIN FWD 4
(c)
P415 Power Distribution Center - Right 1) 415B35 FUEL BOOST PUMP MAIN FWD 1 2) 415A35 FUEL BOOST PUMP MAIN AFT
S 416-020
(8)
Close the applicable boost pump access panel, 545CB/645CB or 545DB/645DB (AMM 28-11-02/401).
S 416-021
(9)
Close the applicable access panel 572GB/672GB (AMM 06-09-08/201).
S 446-044
(10)
Activate the inboard trailing edge flaps (AMM 27-51-00/201).
S 716-022
(11)
Do an operational test for the No. 1 and 4 boost pumps (AMM 28-22-03/401).
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
28-22-06
ALL ú ú 01 Page 609 ú Feb 18/00
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
TASK 28-22-06-206-002
3. Examine the Boost Pump Conduit
______________________________
A. References
(1)
AMM 28-11-00/201 - Fuel Tanks
(2)
AMM 28-11-02/401 - Reserve and Main Tank Access Doors
(3)
AMM 28-22-06/401 - Main Tank Boost Pump Conduit
(4)
AMM 28-26-00/201 - Defueling
B.
Access
(1)
Location Zones 545 Inbd Main Tank (Part), Mid Spar to Rear Spar, Left 645 Inbd Main Tank (Part), Mid Spar to Rear Spar, Right
(2)
Access Panels
545BB Access Panel
645BB Access Panel
C.
Boost Pump Conduit Inspection Preparation
S 656-026
(1) Defuel the No. 2 and 3 main tanks (AMM 28-26-00/201).
NOTE: The conduit for the No. 1 and 4 boost pumps are found
____ in the No. 2 and 3 inboard fuel tanks.
S 016-027
(2) Remove the applicable access panel 545BB/645BB (AMM 28-11-02/401).
S 656-028
WARNING: CAREFULLY DO ALL THE SAFETY PROCEDURES TO PURGE AND GO INTO THE
_______ FUEL TANKS. INJURY TO PERSONS AND DAMAGE TO EQUIPMENT CAN OCCUR IF YOU DO NOT OBEY THE SAFETY PROCEDURES.
(3) Purge and go into the fuel tank (AMM 28-11-00/201).
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
28-22-06
ALL ú ú 01 Page 610 ú Feb 18/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
S 836-029
(4)
Get access to the boost pump conduit.
D.
Inspect the No. 1 and 4 Boost Pump Conduit
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