R NOTE : Read all of the steps in this paragraph before you start work.
____
R The order in which the work steps are done is best decided by the
R maintenance staff together with:
R - other malfunction indications
R - the fuel configuration
R - the aircraft location.
R (1) If the (frangible) overpressure protector 96QM has operated (is R broken), it is important to do all the steps that follow to find what R caused it to break.
R NOTE : The reasons why a burst disc can break are as follows:
____
R
R - a defective/unserviceable disk (non standard)
R that breaks below the (its) correct operating pressure
R
R - a serviceable disk that operated because the pressure
R difference between the center tank and the adjacent left
R wing tank was more than the correct safe operating pressure
R (Ref. AMM 28-12-00 P.Block 001).
「一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一1 EFF : ALL ∞∞28-12-00∞∞∞∞∞∞∞∞∞∞Page 209
Aug 01/05 CES
R (2) Do a check of the applicable fuel tanker or fuel hydrant hose end
R pressure.
R (a) If the fuel pressure is more than 50psi (3.45bar):
R
R - change the fuel pressure (if possible) or
R
R - get another source of fuel supplied at the correct pressure.
R NOTE : If the fuel tanker or fuel hydrant hose end pressure is____
R more than the maximum safe pressure, it can cause:
R - a refuel valve that has been commanded to shut, to stay
R open
R - a overpressure protector (burst disc) to operate
R - damage to the refuel gallery.
R (3) Do a check of the center tank refuel valve 10QU as follows:
R (a) Remove the center tank refuel valve 10QU (Ref. AMM TASK 28-25-51-
R 000-002).
R (b) Do a visual inspection of the refuel valve 10QU, valve position.
R 1_ If the valve is (stays) in the open position, replace the
R VALVE-REFUEL, CTR TK (10QU) (Ref. AMM TASK 28-25-51-000-002)
R and (Ref. AMM TASK 28-25-51-400-002).
R 2_ If the valve is in the closed position (or if the valve is
R replaced in step 1_) do an operational test of the center tank
R refuel valve 10QU (to see if it can open and close) (Ref. AMM
R TASK 28-25-00-710-003).
R 3_ If there is any malfunction of the refuel valve 10QU (and/or
R related sub-systems) refer to the Troubleshooting Fault
R Symptoms List, for the related Task number. Do the necessary
R troubleshooting.
R (4) Do an Inspection of the Tank Venting System (Ref. AMM TASK 28-12-00-
R 200-001) (the center-tank vent-pipe). Replace, if necessary, all
R sections that are unserviceable (example, damaged or blocked).
R (5) Do a check of the pressure relief valve 97QM as follows:
R (a) Get access to the pressure relief valve 97QM (Ref. AMM TASK 28-
R 25-45-000-001).
R (b) Do a visual check of the pressure relief valve 97QM to see if it:
R - has become blocked
R - can open (functionally operate) with a full and free movement.
「一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一1 EFF : ALL ∞∞28-12-00∞∞∞∞∞∞∞∞∞∞Page 210
Aug 01/05 CES 「一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一1 EFF : ALL ∞∞28-12-00∞∞∞∞∞∞∞∞∞∞Page 211
R (c) If necessary, remove any blockage/obstruction or replace the 中國(guó)航空網(wǎng) www.k6050.com 航空翻譯 www.aviation.cn 本文鏈接地址：A320 Trouble Shooting Manual 排故手冊(cè) FUEL 燃油1(12)
