S 216-024

 (3)  
Examine the drain inlet screens above the fuel drain holes in the engine struts (Fig. 609).

 S 216-021

 (4)  
To examine the valve in the catch basin, at the body station 1238 and left and right BL 100, get access through the main wheel well.

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MAINTENANCE MANUAL

(SEE A-A FOR DRAIN VALVE)
A-A
NOTE: SOME DRAINS HAVE THE
LEVELING COMPOUND AT THE
DRAIN HOLE LEVEL BETWEEN
THE HOLE AND THE ADJACENT FRAME.
External Airframe Drainage Section 41
Figure 601

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NOTE:SOME DRAIN HOLES HAVE THE LEVELING COMPOUND AT THE DRAIN HOLE LEVEL BETWEEN
THE HOLE AND THE ADJACENT FRAME AS SHOWN  B-B
IN FIGURE 601.
External Airframe Drainage Section 42 Figure 602
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B STA FWD
1239

A
External Airframe Drainage Section 44 Figure 603 (Sheet 1)
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A 747-400 MAINTENANCE MANUAL
WING CENTER SECTION
STA

UPPER SURFACE
A-A
B-B

External Airframe Drainage Section 44
Figure 603 (Sheet 2)

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A02160
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MAINTENANCE MANUAL

DRAIN TUBE
ASSEMBLY

SEE E
CANTED
PRESSURE
DECK

WING CENTER SECTION UPPER SURFACE
DRAIN
LINE
KEEL
BEAM DRAIN
HOSE
VAPOR BARRIER CLAMP
ACCESS DOOR
RETAINER
EXTERNAL DRAIN
AIR CONDITIONING FITTING
HEAT EXCHANGER SEE F SUPPORT ASSEMBLY RAM AIR OUTLET FWD
DRAIN TUBE
ASSEMBLY

EXTERNAL DRAIN FITTING F
CLAMP LOCATION OF DRAIN TUBE ASSEMBLIES AT BS 1242.5:
DRAIN
LINE

LBL 101.0 RBL 101.0
LBL 66.9 RBL 60.0
LBL 29.7 RBL 24.7
DRAIN TUBE ASSEMBLY
E

External Airframe Drainage Section 44
Figure 603 (Sheet 3)

M35414
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BETWEEN THE HOLE AND THE ADJACENT
B-B
FRAME AS SHOWN IN FIGURE 601.
External Airframe Drainage Section 46 Figure 604 (Sheet 1)
　
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