(3)  
Drain the sump until the container is full.

(4)  
Remove the tool from the sump and close the drain valve.

(5)  
Look at the fuel in the container.

(6)  
If the fuel in the container has visible water (free water), do these steps:

(a)  
Empty the fuel from the container.

(b)  
Use the correct procedures to dispose of the fuel.

(c)  
Continue to drain fuel from the sump drain until all the free water is removed.

(7)  
If the water in the fuel sample container has a foul odor or a brown color, do a detection test for microbial contamination (AMM 28-11-0/201).

(8)  
If you see red dye in the fuel, do the procedure for red dye contamination 
 (AMM 28-10-0/701).

(9)  
Make sure the final sample of fuel the sump drain is clear and bright.

(10)
Install the cap for the auxiliary tank sump.

G.  Drain the Wing Center Cavity Drain System (Airplanes Without an Integral Center Tank) or APU Fuel Line Shroud Drain System
(1)  
Put a container below the drain valve.

(2)  
Open the drain valve and let the collected fluid drain into the container.

(3)  
Close the drain valve.

(4)  
Examine the fluid that you drained to see if there is fuel in it.  If you find some fuel:

(a)  
Tighten the couplings on the APU fuel line or replace the APU fuel line, if it is necessary (AMM 28-22-81/401).

(b)  
AIRPLANES WITH AN AUXILIARY FUEL TANK; Refer to AMM 28-14-0/101 to find a leak in the fuel lines for the auxiliary tank if it is necessary.

(c)  
AIRPLANES WITHOUT AN INTEGRAL FUEL TANK; Refer to AMM 28-12-0/101 to find a leak in the bladder cells, if it is necessary.

500 
12-11-05 Page 304  BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.  May 01/03 

N96532 N98019 N97999 N96592 N96174
500  Fuel System Drains 
May 01/03  Figure 301 (Sheet 1)  12-11-05 
Page 305 
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 

 Fuel System Drains  500 
12-11-05  Figure 301 (Sheet 2)  May 01/03 
Page 306 
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 

500  Fuel System Drains 
May 01/03  Figure 301 (Sheet 3)  12-11-05 
Page 307 
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 

 Fuel System Drains  500 
12-11-05  Figure 301 (Sheet 4)  May 01/03 
Page 308 
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 

500  Fuel Sump Drain Tools 
May 01/03  Figure 302  12-11-05 
Page 309 
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 

HYDRAULIC - SERVICING
1.  Service Hydraulic Reservoirs
A.  General
(1)  The hydraulic fluid filling station (Fig. 201) is provided to fill all hydraulic reservoirs from one location. The servicing station is located on the forward bulkhead of the right wheel well. The filling equipment consists of a manually operated hand pump, a connection for pressure filling and a ground servicing filter. A fluid quantity indicator mounted on the system A reservoir is visible from the fluid filling station. The system B and standby system reservoir are filled automatically when the system A reservoir is being filled, so that when the system A quantity indicator shows full the other two systems are also full. Reservoir servicing procedures are accomplished with the systems depressurized and all flaps and slats retracted.
B.  Equipment and Materials
(1)  Hydraulic Fluid, Fire Resistant - BMS 3-11 (Ref 20-30-21)
NOTE:  All currently qualified BMS 3-11 Type IV hydraulic fluids are interchangeable and intermixable in any proportion.
C.  Service Hydraulic Reservoirs
(1)
If handpump is to be used, place end of suction hose in hydraulic fluid container.

(2)
If a pressure cart is to be used, connect service cart hose to ground filling port.

WARNING:  FIRE-RESISTANT HYDRAULIC FLUIDS CONFORMING TO BMS 3-11 MAY CAUSE SKIN IRRITATION. AVOID PROLONGED OR REPEATED CONTACT WITH THE SKIN. IN CASE OF EYE CONTACT, FLUSH THE EYES WITH WATER AND OBTAIN MEDICAL AID. IN CASE OF INGESTION, OBTAIN MEDICAL AID.
CAUTION:  WHEN SERVICING HYDRAULIC RESERVOIRS MAKE SURE THAT SERVICE EQUIPMENT IS CLEAN, AND THAT CLEAN HYDRAULIC FLUID, FIRE RESISTANT, BMS 3-11, IS USED.
　
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