NOTE : The first section of the fuel supply pipe-line to the
____ pressure switch 39QA is also the primary supply to the center tank (left side) water scavenge jet pump 89QM.
1 Repair/replace the components that are unserviceable.
_
2 Do the Functional Test of the Center Tank Fuel Control (Manual
_ Mode) (Ref. AMM TASK 28-21-00-720-001).
(j) If the P/BSW-FUEL/CTR TK/PUMP 1 (33QA) FAULT legend stays on, do a check of the aircraft wiring (low pressure lines) (Ref. ASM 28-21/03) between the:
- pressure switch connector 39QA-A, pin C and the relay-41QA, terminal 1
- pressure switch connector 39QA-A, pin C and the FLSCU-1 rack connector 7QJ-AA, terminal 12C
- pressure switch connector 39QA-A, pin C and the SDAC-1 rack connector 1WV1-AA, terminal 13F
- pressure switch connector 39QA-A, pin C and the SDAC-2 rack connector 1WV2-AA, terminal 13F
「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 A236
201-299, 401-499, Aug 01/05 CES
- relay-41QA, terminal A and the relay-49QA, terminal 1
- relay-49QA, terminal A and the BOARD-ANN LT TEST & INTFC connector 18LP-A, terminal 31
- BOARD-ANN LT TEST & INTFC connector 18LP-A, terminal 17 and the P/BSW-FUEL/CTR TK/PUMP 1 connector 33QA-A, terminal 7.
NOTE : A short circuit to ground on one of these lines will
____
cause:
- a false LO PR warning to be generated within the FWC
- the FAULT legend/lamp to come on incorrectly. It is possible that a short circuit to ground on the above lines can come from one of the LRUs as follows:
- BOARD-ANN LT TEST & INTFC (18LP)
- FLSCU-1 (7QJ)
- SDAC-1 (1WV1)/SDAC-2 (1WV2)
- RELAY-CTR TK AUTO CONTROL, PUMP 1 (41QA)
- RELAY-CTR TK FAULT INHIBIT, PUMP 1 (49QA).
(k) Repair the unserviceable wiring and connectors.
(l) Do the Functional Test of the Center Tank Fuel Control (Manual Mode) (Ref. AMM TASK 28-21-00-720-001).
「一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一1R EFF : 001-049, 051-099, 101-149, 151-199, ∞∞28-21-00∞∞∞∞∞∞∞∞∞∞Page A237
201-299, 401-499, Aug 01/05 CES
TASK 28-21-00-810-814
Fuel Pumps - Center Tank Fuel Pump No. 2 (Right Side) 38QA System Malfunction
WARNING : OBEY THE FUEL SAFETY PROCEDURES.
_______
WARNING : DO NOT CLOSE AN OPEN (TRIPPED) CIRCUIT BREAKER RELATED TO A
_______ FUEL-PUMP. IF YOU CLOSE THE CIRCUIT BREAKER, THERE IS A RISK:
- OF FIRE OR OF AN EXPLOSION
- OF DAMAGE TO THE AIRCRAFT WIRING AND STRUCTURE.
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.
1. Possible Causes
_______________
- PUMP-FUEL NO 2, CTR TK (38QA)
- CNTOR-CTR TK PUMP 2 SPLY (36QA)
- PRESS SW-FUEL PUMP NO 2, CTR TK (40QA)
- C/B-FUEL/CTR TK/PUMP2 SPLY (30QA)
- aircraft wiring
- pressure switch safety valve
- pressure switch plug (banjo adaptor attachment bolt)
- pressure switch fuel supply pipe-line between the fuel pump canister 85QM and the pressure switch 40QA
2. Job Set-up Information
______________________
A. Fixtures, Tools, Test and Support Equipment
-------------------------------------------------------------------------------REFERENCE QTY DESIGNATION -------------------------------------------------------------------------------
No specific (intrinsically safe) multimeter No specific (intrinsically safe) 500VDC insulation tester 99A28404000000 1 ADAPTOR - SEQUENCE VALVE
「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 A238
201-299, 401-499, Aug 01/05 CES
B. Referenced Information
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
28-21-00-810-829 Fuel - Center Tank Pump 1(2), Power Supply -
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(127)
