- aircraft wiring
2. Job Set-up Information
______________________
A. Fixtures, Tools, Test and Support Equipment
-------------------------------------------------------------------------------REFERENCE QTY DESIGNATION -------------------------------------------------------------------------------
No specific multimeter
B. Referenced Information
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
28-21-00-810-801 Fuel Pumps - Left Wing Tank Fuel Pump No. 1 (Outer)
21QA System Malfunction
ESPM 20-00-00
AMM 28-21-00-710-001 Operational Test of the Wing-Tank Fuel Control
ASM 28-21/01
3. Fault Confirmation
__________________
A. Test
(1) If necessary, do the job set-up of the Operational Test of the Wing-Tanks Fuel Control (Ref. AMM TASK 28-21-00-710-001).
(2) Push (in) the L TK PUMPS 1 P/BSW (13QA).
「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 ∞∞28-21-00∞∞∞∞∞∞∞∞∞∞Page A209
May 01/04 CES
(3) Examine the left wing-tank fuel-pump 1 symbol, on the FUEL system page, at the ECAM lower display unit.
(4) 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 Left Wing Tank Pump No. 1 (Outer) 21QA System Malfunction (Ref. TASK 28-21-00-810-801)
NOTE : The amber LO is only shown when the signals that follow occur
____
at the same time:
- the contactor closed (on) and
- the left tank pump 1 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 28-21/01) as follows:
1 At the panel (contactor box) 107VU, remove the contactor-17QA.
_
2 At the contactor (relay) base 17QA-A, make sure that:
_
- a ground is available at terminal Z (through the closed, de-energized, contacts of contactor-53QA, terminals 4 to 3)
- 28VDC is available at terminal X, when the P/BSW-13QA is set to on (through the closed contacts B3 to B1).
3 Replace all the unserviceable items.
_ 4 Make sure that the contactor-17QA removed in step 1_ is
_
installed.
5 Do the test given in Para. 3.A.
_
「一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一1 EFF : ALL ∞∞28-21-00∞∞∞∞∞∞∞∞∞∞Page A210
May 01/04R CES
(b) Swap (interchange) the items listed that follow, one at a time, with those from the right wing-tank fuel-pump 1 system where applicable:
- the CNTOR-L WING TK PUMP 1 SPLY (17QA)
- the CNTOR-L WING TK STBY SPLY, PUMP 1 (53QA)
- the P/BSW-FUEL/L TK PUMPS/1 (13QA)
- the RELAY-BUS 1/ESS. L TK PUMP 1 (63QA)
- the P/BSW-EMER ELEC PWR/SMOKE DRILL (13XU).
NOTE : The P/BSW-EMER ELEC PWR/SMOKE DRILL (13XU) is only
____ included to complete the list of possible causes. It can only be swapped with a serviceable spare.
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 and right
_
wing-tank fuel-pumps 1.
(2) If the fault continues:
(a) Do a check (Ref. ASM 28-21/01) of the aircraft wiring between:
- the C/B-FUEL/PUMPS/1/L CTL AND R IND (3QA), terminal 2 and the RELAY-BUS 1/ESS. L TK PUMP 1 (63QA), terminal A2
- the C/B-FUEL/PUMPS/1/L CTL AND R IND (3QA), terminal 2 and the RELAY-BUS 1/ESS. L TK PUMP 1 (63QA), terminal C1
- the RELAY-BUS 1/ESS. L TK PUMP 1 (63QA), terminal A1 and the P/BSW-FUEL/L TK PUMPS/1 (13QA), terminal B3
- the RELAY-BUS 1/ESS. L TK PUMP 1 (63QA), terminal X2 and the P/BSW-EMER ELEC PWR/SMOKE DRILL (13XU), terminal C1
- the P/BSW-EMER ELEC PWR/SMOKE DRILL (13XU), terminal C3 and the aircraft ground at 2403VG
- the C/B-FUEL/SMOKE/CONFIG/PUMP CTL (55QA), terminal 2 and the RELAY-BUS 1/ESS. L TK PUMP 1 (63QA), terminal X1 中国航空网 www.aero.cn 航空翻译 www.aviation.cn 本文链接地址：A320 Trouble Shooting Manual 排故手册 FUEL 燃油1(116)
