(Ref. Fig. 301A/TASK 12-32-28-991-001-A)
**ON A/C ALL
Subtask 12-32-28-941-054-A
A. Safety Precautions
WARNING : OBEY THE FUEL SAFETY PROCEDURES.
_______
(1) You must obey the fuel safety procedures (Ref. TASK 28-00-00-910-001) when you do work on the fuel system.
Fuel Sampling For Analysis
Figure 301/TASK 12-32-28-991-001
R 1EFF : 001-049, 051-099, 101-149, 151-199, 1 12-32-28Page 303 1201-299, 401-499, 1Aug 01/05 1 1 1CES 1
R Fuel Sampling For Analysis
R Figure 301A/TASK 12-32-28-991-001-A
R 1EFF : 301-399, 1 12-32-28 Page 304
1 1 May 01/04
1 1
1CES 1
(2)
Put the safety barriers in position.
(3)
Make sure that the ground safety locks are installed on the landing gear (Ref. TASK 32-00-00-481-001).
(4)
On the panel 400VU:
-make sure that the landing-gear control-lever 6GA is in the DOWN position
-put a warning notice in position to tell persons not to operate the landing gear.
(5)
Put warning notices in position to tell persons not to operate the landing gear doors.
(6)
If the fuel temperature is less than -5 DEG.C (+23.00 DEG.F) and/or the water drain valves are frozen, to keep the flight turnaround times, either:
-do the cold weather maintenance procedure to warm the drain valve (Ref. TASK 12-31-28-660-001). or
-remove the fuel samples 30 minutes after the refuel procedure.
NOTE : Removal of the fuel samples after 30 minutes will not remove
____ the water content as satisfactorily as samples removed one hour after the refuel procedure.
NOTE : Do not apply unusually high force to open the water drain
____
valve.
Subtask 12-32-28-010-050
B. Get Access
(1) For access to the center tank water drain valves, open the applicable access panels:
-
for water drain valve 94QM, open access panel 195BB
-
for water drain valve 95QM, open access panel 196BB.
Subtask 12-32-28-480-050
C. Preparation of the Equipment
(1) To get access to the high water drain valves from the ground, attach the:
-ADAPTING PIPE - WATER DRAINING FROM FUEL (98A28101000000) or the
-PIPE ADAPTING-WATER DRAINING (98D28104000000)
1EFF : ALL 1 12-32-28Page 305 1 1 Aug 01/05R 1 1 1CES 1
to the bottle and funnel of the WATER DRAIN PURGER
(98A28104000000).
_________
4. Procedure
R **ON A/C 001-049, 051-099, 101-149, 151-199, 201-299, 401-499,
(Ref. Fig. 301/TASK 12-32-28-991-001)
**ON A/C 301-399,
(Ref. Fig. 301A/TASK 12-32-28-991-001-A)
**ON A/C ALL
Subtask 12-32-28-281-050-A
A. Fuel Sampling for Water Contamination
(1) For the wing-tank water drain valves:
(a) Push the center of the applicable water drain valve with the WATER DRAIN PURGER (98A28104000000). Drain approximately 1.0 l (0.2641 USgal) of fuel from the water drain valve.
NOTE : A rubber shield prevents fuel leakage.
____
(b) Remove the WATER DRAIN PURGER from the water drain valve.
(2) For the center-tank water drain valves:
(a) Push the center of the applicable water drain valve with the WATER DRAIN PURGER (98A28104000002). Drain approximately 1.0 l (0.2641 USgal) of fuel from the water drain valve.
NOTE : A rubber shield prevents fuel leakage.
____
(b) Remove the WATER DRAIN PURGER from the water drain valve.
(3)
Examine the water drain valve for leakage. Leaks are not permitted. NOTE : This step is very important at the center tank water drain
(4)
Put the fuel sample into a clean and sterilized transparent container. If you do not do the analysis immediately, seal the container.
(5)
Do the sample removal procedure at all of the water drain valves.
____ valves 94QM and 95QM, where access is not easy.
Subtask 12-32-28-750-050
B. Water Contamination Test
(1) Let the sample become stable.
(a)
If the sample moves into two layers it contains water. Continue to drain from the water drain valve until it has no water.
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