(b) Make an analysis of the fuel spillage observation reports that are available. Example - from the left or the right side NACA vent.
NOTE : If the fuel spillage was from the left wing NACA vent the
____ problem is in one of the tanks that follows:
- left wing tank
- center tank.
If the fuel spillage was from the right wing NACA vent the problem is in one of the tanks that follows:
- right wing tank
- center tank.
(5) This (active and relatively quick) step, (from the cockpit and refuel control panel) is to see to if you can identify (or confirm/validate) any malfunction(s) or damage in the refuel and associated systems.
(a) Transfer with manual control approximately 500 kg (1100 lb) of fuel (Ref. AMM TASK 28-25-00-869-001). Look for changes (leakage) in FQI values that are not normal. Make sure that:
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- all the fuel removed from the (donor/supply - decreasing FQI) tank is transferred to the (receptor/supplied/receiving -increasing FQI) tank
- no fuel is moved into, or out of, the other tanks (changes in FQIs).
1 Set the crossfeed valve to open (for steps 2_ thru 7_).
_
2 Transfer fuel from the left wing tank to the right wing tank.
_ Make sure that the fuel quantities do not change (increase) in the center tank (with the center tank refuel valve closed).
a If, in the center tank, there is a change of FQI
_ (increase/variation), examine:
- the VALVE-REFUEL, CTR TK (10QU) and replace, if necessary (Ref. AMM TASK 28-25-51-000-002) and (Ref. AMM TASK 28-25-51-400-002).
- the center tank refuel gallery and repair, if necessary.
3 When approximately 500 kg (1100 lb) of fuel has been moved
_ from the left wing tank to the right wing tank, set the right wing refuel valve to closed (SHUT) and let the left wing tank pumps run (operate) for five minutes more.
NOTE : This step sets the conditions to see if the right wing
____ refuel valve can close and then increases the fuel pressure in the fuel galleries. There will be a small transfer of fuel through the suction inlet valve under the conditions given.
a If the VALVE-REFUEL, R WING TK (8QU) did not close during
_ step 3_, replace it (Ref. AMM TASK 28-25-51-000-001) and (Ref. AMM TASK 28-25-51-400-001).
b If any tank(s) FQI is seen to increase, examine the refuel
_ gallery in the related tank(s) and repair, if necessary.
4 Transfer fuel from the left wing tank tank to the center tank.
_ Make sure that the fuel quantities do not change (increase) in the right wing (with the right wing refuel valve closed).
a If, on the right wing side, there is a change of FQI
_ (increase/variation), examine:
- the VALVE-REFUEL, R WING TK (8QU) and replace, if necessary (Ref. AMM TASK 28-25-51-000-001) and (Ref. AMM TASK 28-25-51-400-001).
- the right wing refuel gallery and repair, if necessary.
5 When approximately 500 kg (1100 lb) of fuel has been moved
_ from the left wing tank to the center tank, set the center tank refuel valve to closed (SHUT) and let the left wing tank pumps run (operate) for five minutes more.
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NOTE : This step sets the conditions to see if the center tank
____ refuel valve can close and then increases the fuel pressure in the fuel galleries.
a If the VALVE-REFUEL, CTR TK (10QU) did not close during
_ step 5_, replace it (Ref. AMM TASK 28-25-51-000-002) and (Ref. AMM TASK 28-25-51-400-002).
b If any tank(s) FQI is seen to increase, examine the refuel
_ gallery in the related tank(s) and repair, as necessary.
6 Transfer fuel from the right wing tank to the left wing tank.
_ Make sure that the fuel quantities do not change (increase) in the center tank (with the center tank refuel valve closed).
a If, in the center tank, there is a change of FQI
_ (increase/variation) examine:
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本文鏈接地址：A320 Trouble Shooting Manual 排故手冊 FUEL 燃油2(84)
