(b) Do a wiring check of the HARNESS-L VENT SURGE TK (34QJ1) ( HARNESS-R VENT SURGE TK (34QJ2)) (Ref. AWM 28-46-11) ((Ref. AWM 28-46-12)) and replace, if necessary (Ref. AMM TASK 28-46-43-000-001) and (Ref. AMM TASK 28-46-43-400-001).

 (c) If the harness is serviceable, replace the SENSOR-HIGH LVL, LEFT WING SURGE TK CHANNEL A (28QJ1) (SENSOR-HIGH LVL, RIGHT WING SURGE TK CHANNEL A (28QJ2)) (Ref. AMM TASK 28-46-16-000-001) and (Ref. AMM TASK 28-46-16-400-001).

 **ON A/C 301-399,
 A. Procedure
 (1) Do the steps applicable to the test equipment available.

 (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 4047VC1(2)-A (for the vent surge tank harness 34QJ1(2)) (Ref. AMM TASK 28-46-43-000-001).

 (4) Disconnect the free connector 4047VC1(2)-A from the receptacle 4047VC1(2).

 「一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一1 EFF : ALL ∞∞28-46-00∞∞∞∞∞∞∞∞∞∞Page 297
 Aug 01/05R CES

 (5) Do a resistance check of the sensor 28QJ1(2) at the tank wall connector 4047VC1(2) between pins A and B (Ref. AWM 28-46-11) and (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).

 (7) If the fault continues:

 (a) Get access to the tank wall connector 4047VC1(2)-A (for the vent surge tank harness 34QJ1(2)) (Ref. AMM TASK 28-46-43-000-001).

 (b) Disconnect the free connector 4047VC1(2)-A from the receptacle 4047VC1(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 14A and the tank wall free connector 4047VC1(2)-A, pin A.

 (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 connector AB, pin 14B and the tank wall free connector 4047VC1(2)-A, pin B.

 (e) Do a check (Ref. AWM 28-46-01) of the aircraft wiring (FLSCU-1 BITE 1 test command line) between the FLSCU-1 rack connector AA, pin 15B and the FQIC rack connector AB, pin 14F or the (aircraft wiring (FLSCU-2 BITE 1 test command line) between the FLSCU-2 rack connector AA, pin 15B and the FQIC rack connector AB, pin 12F).

 (f) Do a check (Ref. AWM 28-46-06) of the aircraft wiring (FLSCU-1 LS4 output line) between the FLSCU-1 rack connector AB, pin 1B and the FQIC rack connector AC, pin 4G or the (aircraft wiring (FLSCU-2 LS4 output line) between the FLSCU-2 rack connector AB, pin 1B and the FQIC rack connector AC, pin 1K).

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

 「一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一1 EFF : 301-399, ∞∞28-46-00∞∞∞∞∞∞∞∞∞∞Page 298
 Aug 01/05R CES

 (h) Connect the free connector 4047VC1(2)-A to the receptacle
 4047VC1(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-L VENT SURGE TK (34QJ1) ( HARNESS-R VENT SURGE TK (34QJ2)) (Ref. AWM 28-46-11) ((Ref. AWM 28-46-12)) and replace, if necessary (Ref. AMM TASK 28-46-43-000-001) and (Ref. AMM TASK 28-46-43-400-001).

 (c) If the harness is serviceable, replace the SENSOR-HIGH LVL, LEFT WING SURGE TK CHANNEL A (28QJ1) (SENSOR-HIGH LVL, RIGHT WING SURGE TK CHANNEL A (28QJ2)) (Ref. AMM TASK 28-46-16-000-001) and (Ref. AMM TASK 28-46-16-400-001).

 「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 299
　
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