(3)
Stop the operation of the fuel tanker.
(4)
Put the container below the water drain valve 21QM.
(5)
Install the PURGING TOOL (97A28002117002) on to the water drain valve 21QM (Ref. TASK 28-25-00-650-003).
(6)
Set the fuel tanker to its lowest flow rate and pressure.
(7)
On the panel 800VU:
(a)
Lift the guard and put the MODE SELECT switch to the REFUEL position.
(b)
Lift the guard and put the LH wing-tank REFUEL VALVES switch to the OPEN position.
(c)
Lift the guards and put the remaining REFUEL VALVES switches to the SHUT position.
(d)
Put the TEST switch to the HI LVL position:
-make sure that the LH wing-tank HI LVL light goes out.
(8)
Start the operation of the fuel tanker.
(9)
Make sure that fuel flows into the LH vent surge tank and out of the water drain valve 21QM.
(10) On the panel 800VU:
-release the TEST switch
-put the LH wing-tank REFUEL VALVES switch to the SHUT position.
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(11)
Make sure that the fuel flow from the water drain valve 21QM decreases and then stops.
(12)
Close the water drain valve 21QM and remove the PURGING TOOL (Ref. TASK 28-25-00-650-003).
(13)
On the panel 800VU:
-put the LH wing-tank REFUEL VALVES switch to the OPEN position.
(14)
Let 150 l (39.6254 USgal) of fuel, measured at the tanker, flow into the LH vent surge tank.
(15)
Stop the operation of the fuel tanker.
(16)
On the panel 800VU:
-
put all of the REFUEL VALVES switches to the NORM and guarded position
-
put the MODE SELECT switch to the OFF and guarded position.
Subtask 28-12-45-860-056
E. Aircraft Configuration for Test (Method 3 LH wing only)
NOTE : There are three alternative methods for the configuration for
____
test.
Method 1 (RH wing):
-
is for the RH wing only (no center-tank vent-pipe). Method 2 (LH wing):
-
is with the center tank empty and the center-tank vent-pipe
blanked.
Method 3 (LH wing):
-
is with the center tank full. Methods 2 and 3 prevent the gravity feed of fuel from the LH vent-surge tank to the center tank.
(1)
For the panel assembly 550CB (LH wing only):
(a) Refuel the center tank to full (Ref. TASK 12-11-28-650-003).
(2)
Refuel the LH wing tank to full (Ref. TASK 12-11-28-650-003) and keep the fuel tanker connected to the aircraft.
(3)
Stop the operation of the fuel tanker.
(4)
Put the container below the water drain valve 21QM.
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(5)
Install the PURGING TOOL (97A28002117002) on to the water drain valve 21QM (Ref. TASK 28-25-00-650-003).
(6)
Set the fuel tanker to its lowest flow rate and pressure.
(7)
On the panel 800VU:
(a)
Lift the guard and put the MODE SELECT switch to the REFUEL position.
(b)
Lift the guard and put the LH wing-tank REFUEL VALVES switch to the OPEN position.
(c)
Lift the guards and put the remaining REFUEL VALVES switches to the SHUT position.
(d)
Put the TEST switch to the HI LVL position:
-make sure that the LH wing-tank HI LVL light goes out.
(8)
Start the operation of the fuel tanker.
(9)
Make sure that fuel flows into the LH vent surge tank and out of the water drain valve 21QM.
(10)
On the panel 800VU:
-release the TEST switch
-put the LH wing-tank REFUEL VALVES switch to the SHUT position.
(11)
Make sure that the fuel flow from the water drain valve 21QM decreases and then stops.
(12)
On the panel 800VU:
(a)
Put the center-tank REFUEL VALVES switch to the OPEN position.
(b)
Make sure that the remaining REFUEL VALVES switches are in the SHUT position.
(c)
Put the TEST switch to the HI LVL position:
-make sure that the center-tank HI LVL light goes out.
(13)
Start the operation of the fuel tanker.
(14)
Make sure that fuel flows into the LH vent surge tank and out of the water drain valve 21QM.
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