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757
MAINTENANCE MANUAL
C. Access
(1)
Location Zones
542 Main Tank - Rib No. 17 to No. 21 (Left)
642 Main Tank - Rib No. 17 to No. 21 (Right)
(2)
Access Panels
542DB Main Tank Access Door (Left)
642DB Main Tank Access Door (Right)
D.
Procedure
S 944-033
WARNING: OBEY THE FUEL TANK ENTRY PRECAUTIONS (AMM 28-11-00/201).
_______ FAILURE TO OBEY THE FUEL TANK ENTRY PRECAUTIONS COULD CAUSE INJURY TO PERSON OR DAMAGE TO EQUIPMENT.
(1)
Obey the fuel tank entry precautions (AMM 28-11-00/201).
S 094-025
(2)
Remove the cover from the tubing.
S 434-026
(3)
Put the O-ring (9) on the vent stringer.
S 424-027
(4)
Align the fuel vent float valve (10) with the holes on the vent stringer.
S 434-028
(5)
Install the screws (6), washers (7), and nuts (8) on the fuel vent float valve (10) and vent stringer.
S 414-029
(6)
Install the main tank access door, 542DB or 642DB
(AMM 28-11-01/401).
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28-13-01
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757 MAINTENANCE MANUAL
FLOAT DRAIN VALVE - REMOVAL/INSTALLATION
________________________________________
1. General
_______
A. There are four float drain valves in the fuel vent system. The four float drain valves are installed in the center fuel tank symmetrically at RBBL and LBBL 46. Two of the float drain valves are installed between stringers 8 and 9 and two of the float drain valves are installed between stringers 12 and 13.
B. This procedure contains two tasks. The first task removes the float drain valve. The second task installs the float drain valve.
TASK 28-13-03-004-001
2. Remove the Float Drain Valve (Fig. 401)
____________________________
A. References
(1)
AMM 28-11-00/201, Fuel Tanks
(2)
AMM 28-11-02/401, Center Tank Access Door
B.
Access
(1)
Location Zones
138 Wing Center Section (Left)
134 Wing Center Section (Right)
(2)
Access Panel
134AZ Center Tank Access Door (Right)
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