(2) Test Equipment.

 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.
 (a) If there is:
 - approved test equipment available, go to Step (3)

 - no approved test equipment available, go to Step (6).

 (3) Get access to the tank wall connector 4039VC1(2)-A (for the wing tank harness 57QT(58QT)) (Ref. AMM TASK 28-42-43-000-008).

 (4) Disconnect the free connector 4039VC1(2)-A from the receptacle 4039VC1(2).

 (5) Do a resistance check of the sensor 38QJ1(2) at the tank wall connector 4039VC1(2) between pins <U and <T (Ref. AWM 28-46-11) ( (Ref. AWM 28-46-12)). Make sure the resistance is between 330 and 480 ohms. If there is:

 - continuity as specified above, go to Step (6)

 - no continuity as specified above (resistance check out of range), go to Step (8).

 NOTE : The sensor status (wet or dry) and fuel/air temperature will
____ have an effect on the resistance value.
 (6) Replace the FLSCU-1 (7QJ) (FLSCU-2 (9QJ)) (Ref. AMM TASK 28-46-34-000-001) and (Ref. AMM TASK 28-46-34-400-001).
 「一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一1 EFF : ALL ∞∞28-46-00∞∞∞∞∞∞∞∞∞∞Page A217
 Aug 01/05R CES

 (7) If the fault continues:

 (a) Get access to the tank wall connector 4039VC1(2)-A (for the wing tank harness 57QT(58QT)) (Ref. AMM TASK 28-42-43-000-008).

 (b) Disconnect the free connector 4039VC1(2)-A from the receptacle 4039VC1(2).

 (c) Do a check (Ref. AWM 28-46-11), and (Ref. AWM 28-46-12) of the aircraft wiring (sensor input line - H) between the FLSCU-1(2) rack connector AB, pin 9D and the tank wall free connector 4039VC1(2)-A, pin <U.

 (d) Do a check (Ref. AWM 28-46-11), and (Ref. AWM 28-46-12) of the aircraft wiring (sensor input line - L) between the FLSCU-1(2) rack connectorAB, pin 9C and the tank wall free connector 4039VC1(2)-A, pin <T.

 (e) 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 or ((Ref. AWM 28-46-12) of the aircraft wiring (FLSCU-2 BITE 4 test command line) between the FLSCU-2 rack connector AA, pin 15D and the FQIC rack connector AB, pin 13E).

 (f) Do a check (Ref. AWM 28-46-11) of the aircraft wiring (FLSCU-1 LS10 output line) between the FLSCU-1 rack connector AB, pin 1C and the FQIC rack connector AC, pin 3D or ((Ref. AWM 28-46-12) of the aircraft wiring (FLSCU-2 LS10 output line) between the FLSCU-2 rack connector AB, pin 1C and the FQIC rack connector AC, pin 1G).

 (g) Repair all the unserviceable wiring and connectors (Ref. ESPM 20-00-00).

 (h) Connect the free connector 4039VC1(2)-A to the receptacle 4039VC1(2).

 (i) Do the test in Para. 3.A.

 (8) If the fault continues or if there is no continuity in Step (5):

 (a) Drain, open and vent the tank (Ref. AMM TASK 28-10-00-910-001) and (Ref. AMM TASK 28-10-00-910-002).

 (b) Do a wiring check of the HARNESS-LEFT WING TANK A (57QT) ( HARNESS-RIGHT WING, TANK A (58QT)) (Ref. AWM 28-46-11) ((Ref. AWM 28-46-12)) and replace, if necessary (Ref. AMM TASK 28-42-43-000-005) and (Ref. AMM TASK 28-42-43-400-005).

 「一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一1 EFF : 301-399, ∞∞28-46-00∞∞∞∞∞∞∞∞∞∞Page A218
 Aug 01/05R CES

 (c) If the harness 57QT(58QT) is serviceable, replace the SENSOR-LOW LEVEL, LEFT WING TK INNER CHANNEL A (38QJ1) (SENSOR-LOW LEVEL, RIGHT WING TK INNER CHANNEL A (38QJ2)) (Ref. AMM TASK 28-46-19-000-001) and (Ref. AMM TASK 28-46-19-400-001).
 「一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一1 EFF : 301-399, ∞∞28-46-00∞∞∞∞∞∞∞∞∞∞Page A219
 Aug 01/05R
 CES

 TASK 28-46-00-810-816

 L(R) Low Level Sensor 40QJ1(2)
 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.
　
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