(2)
B00402 Cleaner, Aircraft Surface, MIL-C-87936
B. References
(1) 53-21-00/401, Floor Panels
C. Access
(1) Location Zone
200 Lower Half of Fuselage.
D. Procedure
S 016-002-B00
(1)
Remove the floor panels as it is necessary to get access to the upper surface of the wing center section (Ref 53-21-00/401).
S 216-003-B00
(2)
Examine the drain openings through the aft lower corner of the ribs at the pressure deck beam.
S 216-004-B00
(3)
Examine the internal drains frequently and make sure they are clear from the blockage.
S 146-005-B00
(4)
To clean the internal drains, do the steps that follow:
(a)
Use the cloth that is moist with cleaner solution to remove all the soil and unwanted materials from the drains.
(b)
Examine and clean the horizontal drain hole (Fig. 601).
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A
737-300/400/500MAINTENANCE MANUAL
STA 1016
INTERNAL DRAINAGE SEE A
CENTER STIFFENER
A
CORROSION
DRAIN HOLE
A
WEB CRACK
INTERNAL DRAINAGE
B A
STIFFENER
DRAIN HOLE WEB CENTER STIFFENER
CORROSION
LEVELING B WEB
COMPOUND FRAME
FLANGE
FWD B-B
A-A
Internal Drainage
Figure 601
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A 737-300/400/500MAINTENANCE MANUAL
STA STA STA STA STA STA STA STA STA 360 400 440 480 500A 500C 500E 500G 540
Internal Drain Paths
Figure 602 (Sheet 1)
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A
737-300/400/500MAINTENANCE MANUAL
STA STA STA
540 663.75 727
RBL 70
WING CENTER
BL 0
SECTION
LBL 70
SECTION 46 PRESSURE
DECK
S18R STA 727 STA 727B 727D STA 727F STA 747 STA 787 STA 827 STA 867 STA 907 STA STA
S20R 947 STA
S22R AFT 986.5 STA
S24R CARGO 1016
DOOR
S26R
BL 0
S26L
S24L
S22L
S20L
S18L
SECTION 46 (AFT)
Internal Drain Paths
Figure 602 (Sheet 2)
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A
737-300/400/500MAINTENANCE MANUAL
FUSELAGE DRAIN VALVE - REMOVAL/INSTALLATION
___________________________________________
1. General_______
A. This procedure contains two tasks. The first task is the removal procedure for the fuselage drain valve. The second task is the installation of the fuselage drain valve.
B. You can get access to the fuselage drain valve from the outer surface of the fuselage.
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