R **ON A/C 001-049, 051-099, 101-149, 151-199, 201-299, 401-499,
12-32-28-991-001 Fig. 301
**ON A/C 301-399,
12-32-28-991-001-A Fig. 301A
**ON A/C ALL
12-32-28-991-005 Fig. 302
3. Job Set-up
__________
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 12-32-28-941-055-A
A. Safety Precautions
WARNING : OBEY THE FUEL SAFETY PROCEDURES.
_______
(1)
Put the safety barriers in position.
(2)
Make sure that the ground safety locks are installed on the landing gear (Ref. TASK 32-00-00-481-001).
(3)
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.
(4)
Put warning notices in position to tell persons not to operate the landing gear doors.
(5)
You must obey the fuel safety procedures (Ref. TASK 28-00-00-910-001) when you do work on the fuel system.
(6)
If the fuel temperature is less than -5 DEG.C (+23.00 DEG.F) and/or the water drain valves are frozen, 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.
Subtask 12-32-28-010-054
B. Get Access
(1) For access to the center tank water drain valves, open the applicable access panels: - for water drain valve 94QM, open 195BB - for water drain valve 95QM, open 196BB.
Subtask 12-32-28-480-051
C. Preparation of the Equipment
(1) If it is necessary 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) 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 12-32-28-281-055-A
R A. Fuel Sampling for Microbiological Contamination
NOTE : If you use a test kit, refer to the kit manufacturers instructions____ on fuel sampling and storage. Carefully follow the manufacturers instructions to make sure that the test results are accurate.
R R R R R NOTE : Before you collect the samples, read the manufacturers____ instructions in the test kit. Make sure you use a sample container that is specified and that is clean and dry before use. An incorrect, dirty sample container can give an unwanted effect to the results.
(1) For the wing-tank water drain valves:
(a) Push the center of the applicable water drain valve with the WATER DRAIN PURGER (98A28104000000) and 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 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) and 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 drain valve.
(3) Examine the applicable water drain valve for leakage. Leaks are not permitted.
NOTE : This step is very important at the center tank water drain____ valves 94QM and 95QM, where access is not easy.
(4) Put the fuel sample into a clean and sterilized transparent container and seal the container.
R R NOTE : Make sure that the container is made of glass or fuel____ resistant plastic and has a minimum capacity of 1.0 l (0.2641 USgal).
R R NOTE : Do not put additives into the sample to show the water____ contents.
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