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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
 S 866-004-B00
 (2)  
Find the strut drain exit below the engine (aft of the starter air vent in the right fan cowl panel) (Fig. 601).

 S 866-005-B00

 (3)
Put a dry container below the system disconnect box drain exit.

 S 216-006-B00

 (4)  
Do the drainage check as follows:

 (a)  
With a funnel and a hose, put 2 U.S. gallons (256 fluid ounces) of clean tap water into the system disconnect box.

 (b)  
Apply the water smoothly over the bottom of the disconnect box with approximately 50 percent on the two sides (left or right sides).

 (c)  
Stop approximately 3 minutes.

 (d)  
Make sure that the water collected at the drain exit is no less than 250 fluid ounces. 1) If not, examine for the sources of leakage as follows:

 a) Examine the strut area. b) Examine the strut drain tube. 2) Repair the sources of leakage, if it is necessary.

 (e)  
Make sure the system disconnect box is clear of the blockage and contamination.

 S 866-007-B00
 (5)  
Remove all the water that stays in the strut.

 S 866-008-B00

 (6)
Make sure all areas in the system disconnect box are clean.

 S 416-009-B00

 (7)  
Install the nacelle strut forward fairing access panel (AMM 54-32-01/401).

 TASK 54-11-00-206-014-B00
 3.  Strut Midspar Drain Check_________________________
 A. Equipment
 (1)  
Funnel and Hose

 (2)  
Container - Minimum of 2 U.S. gallons (8 liters) of water

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A 737-300/400/500MAINTENANCE MANUAL
SYSTEM DISCONNECT BOX DRAIN INLETS NACELLE STRUT

Engine Strut Drain - Inspection/Check
Figure 601 (Sheet 1)

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A 737-300/400/500MAINTENANCE MANUAL
STRUT DRAININLET

DRAIN
HEAT SHIELD
LINE

ASSEMBLY
FWD

Engine Strut Drain - Inspection/Check
Figure 601 (Sheet 2)

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737-300/400/500MAINTENANCE MANUAL
UPPER STRUT TOPRESSURE
WING FAIRING

B

NACELLE STRUT ACCESS PANELS - RIGHT SIDE

D

Engine Strut Drain - Inspection/Check Figure 601 (Sheet 3)
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737-300/400/500MAINTENANCE MANUAL
 B. Access
 (1)  
Location Zone
 ZONE 5 LEFT NACELLE
 ZONE 6 RIGHT NACELLE

 (2)  
Access Panel
 5726L STRUT ACCESS DOOR - LEFT NACELLE
 5826R STRUT ACCESS DOOR - RIGHT NACELLE

 5727L TOP STRUT ACCESS DOOR - LEFT NACELLE 5827R TOP STRUT ACCESS DOOR - RIGHT NACELLE
 NACELLE STRUT FAIRING ACCESS PANEL
 C. Procedure
 S 016-011-B00
　
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