(2) If the page shows messages for one or more of the other sensors and/or the FLSCU-1, do (Ref. TASK 28-46-00-810-818).

 「一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一1 EFF : 301-399, ∞∞28-46-00∞∞∞∞∞∞∞∞∞∞Page A276
 May 01/05 CES (3) If the message 284617 DUMMY TEMP SENSOR 41QJ is not shown:

 - maintenance steps are not necessary.
 NOTE : You can get more data from the:
____
 - Aircraft Maintenance Manual (AMM) Chap. 28-46-00, the Fuel Level Sensing System, Description and Operation (D and O)

 - Trouble Shooting Manual (TSM) - Task Supporting Data (Ref.

 P. Block 301)

 - Aircraft Schematic Manual (ASM) (Ref. ASM 28-46/04). You can get more Trouble-shooting data from the CFDS(FUEL):

 - Input Parameters Page 3 (Ref. P. Block 301)

 - Trouble-shooting Data (Ref. P. Block 301).

 4. Fault Isolation
_______________
 A. Ifthe MCDU shows the message 284617 DUMMY TEMP SENSOR 41QJ:
 (1) Do a resistance check of the dummy sensor 41QJ at the terminal block 202VT(92VU) between terminals 21A and 21E (Ref. AWM 28-46-11). Make sure the resistance is between 135 and 165 ohms. If the resistance is:

 - within range as specified above, go to Step (2)

 - not within range as specified above or open circuit, go to Step (4).

 (2) Replace the FLSCU-1 (7QJ), (Ref. AMM TASK 28-46-34-000-001) and (Ref. AMM TASK 28-46-34-400-001).

 (3) If the fault continues:

 (a) Do a check (Ref. AWM 28-46-11) of the aircraft wiring (dummy sensor input line - H) between the FLSCU-1 rack connector AB, pin 7D and the terminal block 202VT, terminal 21F

 (b) Do a check (Ref. AWM 28-46-11) of the aircraft wiring (dummy sensor input line - L) between the FLSCU-1 rack connector AB, pin 7C and the terminal block 202VT, terminal 21C.

 (c) Do a check (Ref. AWM 28-46-11) of the aircraft wiring (FLSCU-1 BITE 4 test command line) between the FLSCU-1 rack connector AA, pin 15D and the FQIC rack connector AB, pin 15E.

 (d) Do a check (Ref. AWM 28-46-11) of the aircraft wiring (FLSCU-1 T2 output line) between the FLSCU-1 rack connector AB, pin 4D and the FQIC rack connector AC, pin 2D.

 (e) Repair all the unserviceable wiring and connectors.

 (f) Do the test 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 : 301-399, ∞∞28-46-00∞∞∞∞∞∞∞∞∞∞Page A277
 May 01/05 CES

 (4) If the fault continues or if the resistance of the dummy sensor is not in range in Step (1):
 (a) Replace the RESISTOR-TEMP SENSOR DUMMY LOAD 41QJ.

 (b) Do the test 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 : 301-399, ∞∞28-46-00∞∞∞∞∞∞∞∞∞∞Page A278
 May 01/05 CES

 TASK 28-46-00-810-844
 Dummy Temperature Sensor 42QJ
 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
_______________
 - FLSCU-2 (9QJ)

 - RESISTOR (42QJ)

 - aircraft wiring

 2. Job Set-up Information
______________________
 A. Referenced Information
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
28-46-00-810-818 FLSCU1(2) 7QJ(9QJ)
 AMM 28-46-00-740-001 Functional (BITE) Test
 AMM 28-46-34-000-001 Removal of the Fuel-Level Sensing Control-Unit

 (FLSCU) (7QJ,9QJ) AMM 28-46-34-400-001 Installation of the Fuel-Level Sensing Control-Unit
 (FLSCU) (7QJ,9QJ)
 ASM 28-46/04
 AWM 28-46-12

 3. Fault Confirmation
__________________
 A. Do the BITE test of the FLSS (Ref. AMM TASK 28-46-00-740-001).
 (1) Examine the FLSS STATUS Page.

 (2) If the page shows messages for one or more of the other sensors and/or the FLSCU-2, do (Ref. TASK 28-46-00-810-818).
　
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