_
TASK 28-42-34-400-001).
(b) Do a check of the aircraft wiring (INC/DEC common electrical wire) (Ref. ASM 28-42/03) between the preselector end connector 5QT-A, pin K and the FQIC (3QT) rack connector AB, pin 3E.
1 Repair all the unserviceable wiring and connectors.
_
(c) Do the tests given in Para. 3.B.
**ON A/C 301-399,
D. Procedure - The Preselector PRESELECTED Fuel Quantity Fails To Change When The INC/DEC Switch Is Set To INC Or DEC
NOTE : The preselector PRESELECTED fuel quantity must first be increased
____ from the ACTUAL fuel quantity before it can be decreased. This is because the PRESELECTED fuel quantity cannot be set to less than the ACTUAL fuel quantity.
(1) On the MCDU go to SYSTEM REPORT/TEST - FUEL (Ref. AMM TASK 31-32-00-860-001).
(2) Do the Interrogation of the FQIS Input Parameter Pages (Ref. AMM TASK 28-42-00-740-003).
(3) Go to the Input Parameters Page 3 - FQIS DISCRETE INPUTS.
(4) At the external REFUEL/DEFUEL control panel, have the preselector 5QT INC/DEC switch set, and held, to INC.
NOTE : This step requires a second person.
____
(5) Examine the bit 2Q (PRESELECTOR 5QT INCREMENT).
(6) Release the preselector INC/DEC switch.
(7) If during the time the INC/DEC is set to INC:
(a) The bit 2Q shows a 1 go to step (8).
(b) The bit 2Q shows a 0: 1 Do a check of the aircraft wiring (INCREMENT electrical wire)
_ (Ref. ASM 28-42/03) between the preselector end connector 5QT-A, pin L and the FQIC (3QT) rack connector AC, pin 4K.
2 Repair all the unserviceable wiring and connectors.
_
3 Do the tests given in Para. 3.B.
_
「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 ∞∞28-42-00∞∞∞∞∞∞∞∞∞∞Page B275
May 01/05R CES
(8) At the external REFUEL/DEFUEL control panel, have the preselector 5QT INC/DEC switch set, and held, to DEC.
NOTE : This step requires a second person.
____
(9) Examine the bit 2R (PRESELECTOR 5QT DECREMENT).
(10) Release the preselector INC/DEC switch.
(11) If during the time the INC/DEC is set to DEC:
(a) The bit 2R shows a 1 go to step (12).
(b) The bit 2R shows a 0:
(12) If the fault continues:
1_ Do a check of the aircraft wiring (DECREMENT electrical wire)
(Ref. ASM 28-42/03) between the preselector end connector
5QT-A, pin M and the FQIC (3QT) rack connector AC, pin 4J.
2_ Repair all the unserviceable wiring and connectors.
3_ Do the tests given in Para. 3.B.
(a) Do a check of and replace, if necessary: 1 The PRESELECTOR-FUEL QUANTITY, MULTI TANK (5QT) (Ref. AMM TASK
_
28-42-21-000-001) and (Ref. AMM TASK 28-42-21-400-001). 2 The FQIC (3QT) (Ref. AMM TASK 28-42-34-000-001) and (Ref. AMM
_ TASK 28-42-34-400-001).
「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 : 301-399, ∞∞28-42-00∞∞∞∞∞∞∞∞∞∞Page B276
May 01/05 CES
**ON A/C ALL
TASK 28-42-00-810-824
Fuel Quantity - Indicator Multi Tank 6QT
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.
1. Possible Causes
_______________
- IND-FUEL QTY MULTI TANK (6QT)
- RELAY-REFUEL/DEFUEL CTL PNL DOOR POSITION (14QU)
- CTL PNL-REFUEL/DEFUEL (800VU)
- SW-TEST/LTS/HIGH (2QJ)
- aircraft wiring
- diode between pins 2 and 1 (part of diode module 4001VD)
2. Job Set-up Information
______________________
A. Fixtures, Tools, Test and Support Equipment
-------------------------------------------------------------------------------REFERENCE QTY DESIGNATION -------------------------------------------------------------------------------
No specific multimeter
B. Referenced Information
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
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