28-13-03
ALL ú ú 01 Page 402 ú Jun 18/99
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
FUEL VENT TUBE SEE A
FUEL VENT TUBE SEE A
VENT TUBE INLET FUEL VENT TUBE BOLT
NUT (10 LOCATIONS)
(12 LOCATIONS) BOLT (12 LOCATIONS)
WASHER (12 LOCATIONS) WASHER (10 LOCATIONS)
SURGE TANK
WINGTIP DRY BAY
INBD
FWD
FUEL VENT TUBE
A
Wing Surge Tank Fuel Vent Tube Installation
Figure 401
G54707
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28-13-03
ALL ú ú 02 Page 403 ú Jun 10/97
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
S 034-013
(6) Disconnect the vent tube clamps from the structure.
NOTE: Keep the shims or the spacers for the installation task.
____
S 034-014
(7) Disconnect the applicable couplings for the vent tube to remove the tube in wingtip dry bay.
NOTE: Discard the coupling O-rings.
____
S 024-015
(8) Remove the vent tube and the clamps.
NOTE: Discard the O-rings in the vent tube flange.
____
TASK 28-13-03-404-016
3. Wing Surge Tank Fuel Vent Tube Installation (Fig. 401)___________________________________________
A. Equipment
(1)
Bonding Meter (AMM 20-22-01/601)
B.
Consumable Materials
(1)
Sealant
NOTE: Use one of the following:
____
(a)
A00251 BMS 5-26 Type II, Class B-2
(b)
A00000 Proseal 860, Class B-1/6
(2)
D00128 Petrolatum - Technical, VV-P-236
(3)
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 (Purging and Tank Entry)
(4)
AMM 28-11-00/801, Fuel Tanks
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28-13-03
ALL ú ú 01 Page 404 ú Jun 18/99
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL
(5)
AIPC 28-13-01
D.
Access
(1)
Location Zones
555 Surge Tank, Front Spar to Rear Spar, Left
556 Dry Bay, Front Spar to Rear Spar, Left
655 Surge Tank, Front Spar to Rear Spar, Right
656 Dry Bay, Front Spar to Rear Spar, Right
(2)
Access Panels
556AB Wingtip Dry Bay Access Door
556BB Wingtip Dry Bay Access Door
656AB Wingtip Dry Bay Access Door
656BB Wingtip Dry Bay Access Door
E.
Do the Install the Fuel Vent Tube in the Wingtip Dry Bay Procedure
S 114-017
(1)
Go into the wingtip dry bay.
S 114-035
(2)
Clean the mounting areas for the vent tube clamps with a solvent.
S 424-018
(3)
Install the new O-rings in the grooves on the vent tube flanges and all the disconnected tube couplings.
S 424-038
(4)
Connect the tube couplings together and put the vent tube into its position.
S 434-039
(5)
Loosely connect the clamps to the support brackets to hold the tubing into its position.
NOTE: Do not tighten the clamps.
____
S 434-019
(6)
Install the bolts and the washers (10 locations) that attach the vent tube flange to the fitting on the rear spar.
(7)
Tighten the bolts.
S 434-020
(8)
Put the washers on the bolts that attach the vent tube flange to the inboard end of the wingtip dry bay and put the bolts into the bolt holes (12 locations).
S 434-040
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