(b) Make sure that the FUEL page shows on the ECAM lower display unit.
(2) Make sure that the center tank contains more than 250 kg (560 lb) of fuel. Refuel (Ref. AMM TASK 12-11-28-650-004) or transfer fuel (Ref. AMM TASK 28-25-00-869-001), if necessary.
(3) Make sure that the CTR TK MODE SEL P/BSW (48QA) white MAN legend is on. If necessary, release (out) the CTR TK MODE SEL P/BSW (48QA) to set the center tank fuel pumps control to manual mode.
(4) Push (in) the CTR TK PUMP 2 P/BSW (34QA).
(5) Examine the center-tank right side fuel-pump No. 2 symbol, on the FUEL system page, at the ECAM lower display unit.
(6) If the symbol shows:
- green in-line, no more maintenance steps are necessary (normal operation)
- amber cross-line, do Para. 4.A.
- amber LO, do the TSM procedure Center Tank Pump No. 2 (Right Side) 38QA System Malfunction (Ref. TASK 28-21-00-810-814).
NOTE : The amber LO is only shown when the signals that follow occur
____
at the same time:
- the contactor closed (on) and
- the center tank pump 2 low fuel pressure.
4. Fault Isolation
_______________
A. Procedure
(1) Do the initial checks as given in:
- step (a), with a multimeter
and/or
- step (b), by substitution and replacement.
(a) Do a check of the electrical circuits (Ref. ASM 28-21/03) as follows:
1 At the panel (contactor box) 107VU, remove the contactor-36QA.
_
2 At the contactor (relay) base 36QA-A, make sure that:
_ - a ground is available at terminal Z
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- 28VDC is available at terminal X, when the P/BSW-34QA is set to on (through the closed contacts B3 to B1).
3 Replace all the unserviceable items.
_
4 Make sure that the contactor-36QA removed in step 1_ is
_
installed.
5 Do the test given in Para. 3.A.
_
(b) Swap (interchange) the items listed that follow, one at a time, with those from the center-tank fuel-pump 1 system:
- the CNTOR-CTR TK PUMP 2 SPLY (36QA)
- the RELAY-CTR TK AUTO CONTROL, PUMP 2 (42QA)
- the P/BSW-FUEL/CTR TK/PUMP 2 (34QA).
1 Do the test given in Para. 3.A.
_
2 If the fault is removed/cleared:
_ a Replace all the unserviceable items.
_
b Do the test given in Para. 3.A. for the left (1) and right
_ (2) center-tank fuel-pumps.
(2) If the fault continues:
(a) Do a check (Ref. ASM 28-21/03) of the aircraft wiring between:
- the C/B-FUEL/CTR TK/PUMPS 1 & 2/CTL & IND (32QA), terminal 2 and the P/BSW-FUEL/CTR TK/PUMP 2 (34QA), terminal B3
- the P/BSW-FUEL/CTR TK/PUMP 2 (34QA), terminal B1 and the RELAY-CTR TK AUTO CONTROL, PUMP 2 (42QA), terminal B
- the RELAY-CTR TK AUTO CONTROL, PUMP 2 (42QA), terminal 3 and the CNTOR-CTR TK PUMP 2 SPLY (36QA), terminal X
- the CNTOR-CTR TK PUMP 2 SPLY (36QA), terminal Z and the aircraft ground DC2 at 1176VT.
(b) Repair all the unserviceable wiring and connectors (Ref. ESPM 20-00-00).
(c) Do the test given in Para. 3.A.
「一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一1R EFF : 001-049, 051-099, 101-149, 151-199, ∞∞28-21-00∞∞∞∞∞∞∞∞∞∞Page A256
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TASK 28-21-00-810-819
Fuel Pumps - Center Tank Pump 1 and Center Tank Pump 2 Operate Incorrectly in Auto Mode When Slats Extended More Than 16 Degrees
WARNING : OBEY THE FUEL SAFETY PROCEDURES.
_______
WARNING : WHEN YOU DO WORK ON THE FUEL SYSTEM WIRING, YOU MUST USE TEST
_______ EQUIPMENT THAT IS APPROVED (REFER TO INTERNATIONAL OR NATIONAL SPECIFICATIONS FOR INTRINSICALLY SAFE TEST EQUIPMENT, E.G. EN50-020, UL913 OR EQUIVALENT). TEST EQUIPMENT THAT IS NOT APPROVED CAN CAUSE FIRE OR AN EXPLOSION.
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本文鏈接地址：A320 Trouble Shooting Manual 排故手冊 FUEL 燃油1(135)
