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////////////////////////A / PW4000 SERIES /747-400 / ENGINES /MAINTENANCE MANUAL ////////////////////////
FORWARD MOUNT 
DRAIN INLET 
SEE  A 
RACEWAY 
DRAIN INLET 
CENTER MOUNT 
DRAIN INLET  SEE  A 
STRUT DRAIN 
SEE  A  LINE EXIT 
SEE  B  C
FORWARD MOUNT 
DRAIN LINE 
CENTER MOUNT 
DRAIN LINE 
RACEWAY 
DRAIN LINE 

1 (SHEET 3)
FWD
A
Strut Drains Inspection Figure 604 (Sheet 1)
E69516
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FORWARD MOUNT 
DRAIN INLET 
SEE  A 
RACEWAY 
DRAIN INLET 
CENTER MOUNT 
DRAIN INLET  STRUT DRAIN  SEE  A 
SEE  A  LINE EXIT 
SEE  B  C 
FORWARD MOUNT 
DRAIN LINE 
CENTER MOUNT 
DRAIN LINE 
RACEWAY 
DRAIN LINE 

1 (SHEET 3)
FWD A
Strut Drains Inspection Figure 604 (Sheet 2)
 E69520
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////////////////////////A / PW4000 SERIES /747-400 / ENGINES /MAINTENANCE MANUAL ////////////////////////
(SHEET 1,2)1
2
FWD
B
2 STRUT DRAINFWD LINE EXIT
C
Strut Drains Inspection
Figure 604 (Sheet 3)

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D. Procedure
 S 046-012-N00
 WARNING: DO THE DEACTIVATION PROCEDURE TO PREVENT THE OPERATION OF THE
_______ THRUST REVERSER. THE ACCIDENTAL OPERATION OF THE THRUST REVERSER CAN CAUSE INJURIES TO PERSONS AND DAMAGE TO EQUIPMENT.
 (1)  
Do the deactivation procedure for the thrust reverser for ground maintenance (AMM 78-31-00/201).

 S 016-013-N00

 (2)  
Open the fan cowl panels (AMM 71-11-04/201).

 S 016-014-N00

 (3)  
Open the core cowl panels (AMM 71-11-06/201).

 S 016-029-N00
 WARNING: OBEY THE INSTRUCTIONS IN THE PROCEDURE TO OPEN THE THRUST
_______ REVERSERS. IF YOU DO NOT OBEY THE INSTRUCTIONS, INJURIES TO PERSONS AND DAMAGE TO EQUIPMENT CAN OCCUR.
 (4)  
Open the thrust reversers (AMM 78-31-00/201).

 S 036-016-N00

 (5)
Disconnect these hoses for the strut drain lines (Figure 604):

 (a)  
The hose for the forward mount drain line

 (b)  
The hose for the center mount drain line

 (c)  
The hose for the raceway drain line.

 S 286-017-N00
 (6)  Do a check for a clear flow of air through the engine mounted strut drain lines.
 (a)  Block two inlets with plugs while you cover the third inlet with a rag to collect the unwanted materials.
 NOTE: The rag will ensure that material is not blown back
____
 into the strut.

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