(c) Do a check of the aircraft wiring (ground supply) (Ref. ASM 28-42/03) between the end connector 5QT-A, pin D and the ground point.
(d) Repair all the unserviceable wiring and connectors.
(e) Do the tests given in Para. 3.B.
(11) If the fault continues:
(a) Do a check of the aircraft wiring (ARINC 429 BUS electrical wires) (Ref. ASM 28-42/03) between:
- the FQIC (3QT) rack connector AB, pin 6F and the preselector end connector 5QT-A, pin B
- the FQIC (3QT) rack connector AB, pin 6E and the preselector end connector 5QT-A, pin C.
(b) Repair all the unserviceable wiring and connectors.
(c) Do the tests given in Para. 3.B.
「一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一1R EFF : 301-399, ∞∞28-42-00∞∞∞∞∞∞∞∞∞∞Page B270
May 01/05 CES
**ON A/C ALL
B. Procedure - A Single LED (Or Segment Of), The CKPT Legend Or The END Legend Fail To Come On When The TEST Switch Set Is To LTS
(1) Replace the PRESELECTOR-FUEL QUANTITY, MULTI TANK (5QT) (Ref. AMM TASK 28-42-21-000-001) and (Ref. AMM TASK 28-42-21-400-001).
C. Procedure - The Preselector LEDs, The CKPT And The END Legends Do Not Come On When The TEST Switch (2QJ) Is Set To LTS
(1) Examine the indicator (6QT) LEDs while the TEST switch is set to LTS.
(a) If the indicator (6QT) LEDs are also off, do steps (2) thru (5). NOTE : This points to a failure of the LTS TEST command input at
____
2QJ.
(b) If the indicator (6QT) LEDs are on, do steps (6) thru (9). NOTE : This shows the LTS TEST command input at 2QJ is OK.
____
(2) Replace the CTL PNL-REFUEL/DEFUEL (800VU) (Ref. AMM TASK 28-25-55-000-001) and (Ref. AMM TASK 28-25-55-400-001).
NOTE : If due to airline operational conditions it is not possible to
____ replace the CTL PNL-REFUEL/DEFUEL (800VU) and internal trouble-shooting is required, do steps (3) and (4).
(3) Do a check of and replace, if necessary:
(a) The SW-TEST/LTS/HIGH (2QJ).
(b) The diode between pins 4 and 3 (part of diode module 4001VD).
(4) 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.
「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 B271
May 01/05R
CES
-----------------------------------------------------------------------------| CONNECTOR-PIN | COMPONENT TO COMPONENT | CONNECTOR-PIN | |-----------------------------------------------------------------------------| | 4023VC-<A --------------------------------------- 4001VD-3 | | 4001VD-4 ------------------------ 4001VT-4K | | 4001VT-4B ----------------------- 2QJ-3A | | 2QJ-1A -------------------------------------- 4024VC-<J | -----------------------------------------------------------------------------
(a) Repair all the unserviceable wiring and connectors.
(b) Do the tests given in Para. 3.B.
(5) If the fault continues:
(a) Replace the PRESELECTOR-FUEL QUANTITY, MULTI TANK (5QT) (Ref. AMM TASK 28-42-21-000-001) and (Ref. AMM TASK 28-42-21-400-001).
(b) Do a check of the aircraft wiring (Ref. ASM 28-42/03) between:
- the preselector end connector 5QT-A, pin R and the CTL PNL-REFUEL/DEFUEL (800VU) end connector 4023VC-A, pin <A (LED TEST electric wire)
- the CTL PNL-REFUEL/DEFUEL (800VU) end connector 4024VC-A, pin <J and the aircraft ground.
(c) Repair all the unserviceable wiring and connectors.
(d) Do the tests given in Para. 3.B.
(6) Replace the PRESELECTOR-FUEL QUANTITY, MULTI TANK (5QT) (Ref. AMM TASK 28-42-21-000-001) and (Ref. AMM TASK 28-42-21-400-001).
(7) Do a check of the aircraft wiring (Ref. ASM 28-42/03) between:
- the preselector end connector 5QT-A, pin R and the CTL PNL-REFUEL/DEFUEL (800VU) end connector 4023VC-A, pin <A (LED TEST electric wire)
- the CTL PNL-REFUEL/DEFUEL (800VU) end connector 4024VC-A, pin <J and the aircraft ground.
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