(a)
In the APU fuel line or fittings into the shroud
(b)
In the auxiliary tank (if installed) fuel line or fittings into the shroud
(c)
In the auxiliary tank (if installed) removable cell(s) into the tank cavity drain system
(d)
In the auxiliary tank (if installed) sump drain valve into the sump drain bellows and into the tank cavity drain.
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B. Equipment (Fig. 302)
(1)
Main Tank Sump Drain Tool - C12002-7 (recommended); F80201-1 (alternate)
(2)
Center Tank Sump Drain Tool - F80201-1
(3)
AIRPLANES WITH AN AUXILIARY TANK;
Auxiliary Tank Sump Drain Tool - F72995 (recommended); F72868 (alternate)
(4)
Clear plastic or glass container - 1 gallon capacity
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C. Prepare for the Procedure
(1)
If the ambient temperature is less than 0° Celsius (32° Fahrenheit), do the cold weather maintenance procedure (AMM 12-50-0/201).
NOTE: Supply heat before you drain the sumps to make sure the fuel drains freely.
(2)
Let water go to the bottom of the tank before you open the sump drain valve.
D. Drain the Sumps for the Tank No. 1 and 2
(1)
Put the top end of the tool against the bottom side of the poppet on the sump drain valve.
(2)
Put the container below the tool.
(3)
Push up on the poppet until fuel flows into the container.
(4)
Drain each sump until the container is full.
(5)
Remove the sample container from the sump and let the valve close.
(6)
Look at the fuel in the container.
(7)
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.
(8)
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).
(9)
If you see red dye in the fuel, do the procedure for red dye contamination
(AMM 28-10-0/701).
(10)
Make sure the final sample of fuel the sump drain is clear and bright.
E. AIRPLANES WITH AN INTEGRAL CENTER TANK; Drain the Sump for the Center Tank
NOTE: Put the airplane in 0.25° nose high, 0° roll attitude to drain the maximum quantity of fuel from the center tank sump drain.
(1)
Open the access door for the sump drain.
(2)
Electrically ground the sump drain tool to the airplane structure.
(3)
Turn the sump drain valve clockwise and push it up to open it.
NOTE: You must hold the drain valve in this position.
(4)
Drain each sump until the container is full.
(5)
Release the sump drain valve and turn it counterclockwise to close it.
(6)
Look at the fuel in the container.
(7)
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.
(8)
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).
(9)
If you see red dye in the fuel, do the procedure for red dye contamination
(AMM 28-10-0/701).
(10)
Make sure the final sample of fuel the sump drain is clear and bright.
(11)
Close the access door for the sump drain.
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May 01/03 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 12-11-05 Page 303
F. AIRPLANES WITH AN AUXILIARY FUEL TANK; Drain the Sump for the Auxiliary Fuel Tank
(1)
Open the cap for the auxiliary tank sump in the bottom fuselage skin.
(2)
Put the sump drain tool for the auxiliary tank into the sump drain valve.
(a)
Obey the instructions on the tool label.
(b)
Drain the fuel into a container.
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