(a) Repair all the unserviceable wiring and connectors.
(b) Do the tests given in Para. 3.B.
(8) Replace the CTL PNL-REFUEL/DEFUEL (800VU) (Ref. AMM TASK 28-25-55-000-001) and (Ref. AMM TASK 28-25-55-400-001).
「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 : ALL ∞∞28-42-00∞∞∞∞∞∞∞∞∞∞Page B272
May 01/05 CES
(9) If due to airline operational conditions it is not possible to replace the CTL PNL-REFUEL/DEFUEL (800VU) do the internal trouble-shooting as follows:
(a) Do a check of and replace, if necessary:
1 The SW-TEST/LTS/HIGH (2QJ).
_
2 The diode between pins 4 and 3 (part of diode module 4001VD).
_
(b) Do a check of the CTL PNL-REFUEL/DEFUEL (800VU) wiring (Ref. ASM 28-25/03) between the connections and components, as shown in the table that follows:
NOTE : The circuit connections shown in the table are
____ abbreviated, for example:
- the connector 4023VC, pin <A is shown as 4023VC-<A
- the diode module 4001VD, terminal 3 is shown as 4001VD-3
- the terminal block 4001VT, terminal 4K is shown as 4001VT-4K.
-----------------------------------------------------------------------------| CONNECTOR-PIN | COMPONENT TO COMPONENT | CONNECTOR-PIN | |-----------------------------------------------------------------------------| | 4023VC-<A --------------------------------------- 4001VD-3 | | 4001VD-4 ------------------------ 4001VT-4K | | 4001VT-4B ----------------------- 2QJ-3A | | 2QJ-1A -------------------------------------- 4024VC-<J | -----------------------------------------------------------------------------
(c) Repair all the unserviceable wiring and connectors.
(d) Do the tests given in Para. 3.B.
R **ON A/C 001-049, 051-099, 101-149, 151-199, 201-299, 401-499,
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.
「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 B273
Aug 01/05 CES
(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 8Q (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 8Q shows a 1 go to step (8).
(b) The bit 8Q 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 AB, pin 2E.
2 Repair all the unserviceable wiring and connectors.
_
3 Do the tests given in Para. 3.B.
_
(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 7Q (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 7Q shows a 1 go to step (12).
(b) The bit 7Q shows a 0: 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 AB, pin 4E.
2 Repair all the unserviceable wiring and connectors.
_
3 Do the tests given in Para. 3.B.
_
(12) If the fault continues:
(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).
「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, ∞∞28-42-00∞∞∞∞∞∞∞∞∞∞Page B274
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