TASK 54-11-00-206-032-B00
 5. Heat Shield Assembly Drain Check
________________________________
 A. Equipment
 (1)  
Funnel and Hose

 (2)  
Container - Minimum of 1 U.S. gallons (4 liter) of water

 B. Access
 (1)  
Location Zone
 ZONE 5 LEFT NACELLE
 ZONE 6 RIGHT NACELLE

 (2)  
Access Panel 5742L AFT STRUT FAIRING (OUTBOARD) - LEFT NACELLE 5842R AFT STRUT FAIRING (OUTBOARD) - RIGHT NACELLE

 C. Procedure
 S 866-034-B00
 (1) Find the drain exit in the heat shield assembly (Fig. 601).
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 737-300/400/500MAINTENANCE MANUAL
 S 866-035-B00
 (2)
Put a dry container below the heat shield assembly drain exit.

 S 216-036-B00

 (3)  
Do the drainage check as follows:

 (a)  
With a funnel and hose, put 1 U.S. gallon (128 fluid ounces) of clean tap water to the forward end of the heat shield assembly.

 (b)  
Stop approximately 3 minutes.

 (c)  
Make sure that the water collected at the drain exit is no less than 114 fluid ounces. 1) If not, examine the sources of leakage as follows:

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

 (d)  
Make sure the upper surface of the heat shield assembly is clear of the blockage and contamination.

 S 866-037-B00
 (4)  
Remove all the water that stay in the strut.

 S 866-038-B00

 (5)  
Make sure all areas in the upper surface of the heat shield assembly are clean.

 S 416-039-B00

 (6)  
Install the fairing to the outboard forward end of the aft strut fairing.

 TASK 54-11-00-206-046-B00
 6. Remove All Blockage From The System Disconnect Box Drain
________________________________________________________
 A. Equipment
 (1)  
Rag

 (2)  
25-35 Psig Regulated Air Supply (Hose and Nozzle)

 B. References
 (1)  
AMM 54-32-01/401, Nacelle Strut Forward Fairing

 (2)  
AMM 71-11-02/201, Fan Cowl Panels

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
 C. Access
 (1)  
Location Zone
 ZONE 5 LEFT NACELLE
 ZONE 6 RIGHT NACELLE

 (2)  
Access Panel
 5737L FAN COWL - LEFT NACELLE
 5837R FAN COWL - RIGHT NACELLE

 NACELLE STRUT FORWARD FAIRING ACCESS PANEL
 D. Procedure
 S 416-041-B00
 (1)  
Remove the forward fairing (AMM 54-32-01/401).

 S 016-042-B00

 (2)  
Open the fan cowl panels (AMM 71-11-02/201).

 S 866-043-B00

 (3)  
Remove the blockage as follows:

 (a)  
Put a rag above the drain line inlet to collect the contamination.

 (b)  
Apply the 25-35 psig air pressure through the drain line exit.

 (c)  
Make sure the air flows freely from the inlet.

 (d)  
Remove the rag and contamination from the drain line inlet.

 (e)  
Make sure all areas are clean and dry.

 S 416-044-B00
 (4)  
Install the forward fairing (AMM 54-32-01/401).

 S 416-045-B00

 (5)  
Close the fan cowl panels (AMM 71-11-02/201).

 TASK 54-11-00-206-047-B00
 7.  Remove All Blockage From The Strut Midspar Drain________________________________________________
 A. Equipment
 (1)  
Rag

 (2)  
　
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