(6) If the harness 14QT1(2) is serviceable, replace the PROBE-FUEL QTY NO 4 AND CIC,RIB 2-3 L WNG TK INR GRP B (24QT1) (PROBE-FUEL QTY NO 4 AND CIC,RIB 2-3 R WNG TK INR GRP B (24QT2)) (Ref. AMM TASK 28-42-15-000-001) and (Ref. AMM TASK 28-42-15-400-001).

R **ON A/C 001-049, 051-099, 101-149, 151-199, 201-299, 401-499,
 Post SB 28-1087 For A/C 001-049,051-061,101-105,201-203,
 A. Procedure
 NOTE : Where applicable, to show the difference between the left and
____ right wing installations, the FINs given in this procedure are written as follows:
 - the left wing, no parenthesis, FIN

 - the right wing, in parenthesis, (FIN).

 (1) Temporarily replace the FQIC 3QT with a serviceable item (Ref. AMM TASK 28-42-34-000-001) and (Ref. AMM TASK 28-42-34-400-001).
 NOTE : The step (1) has been included because it is important to make
____ sure that the FQIC is serviceable before you start more steps.
 (2) If the message L(R) QTY PROBE 24QT1(2) is not shown:

 - complete the installation of the FQIC (3QT) (Ref. AMM TASK 28-42-34-000-001) and (Ref. AMM TASK 28-42-34-400-001).

 (3) If the message L(R) QTY PROBE 24QT1(2) is shown:

 (a) Remove the temporary installed serviceable FQIC 3QT (Ref. AMM TASK 28-42-34-000-001) and return it to stores.

 (b) Install the initial FQIC 3QT (Ref. AMM TASK 28-42-34-400-001).

 「一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一1R EFF : 001-049, 051-099, 101-149, 151-199, ∞∞28-42-00∞∞∞∞∞∞∞∞∞∞Page 279
 201-299, 401-499, Aug 01/05 CES

 (4) Get access to the fused connector 4043VC-A (4044VC-A) (Ref. AMM TASK 28-42-43-000-008).

 (5) Remove the fused connector 4043VC-A (4044VC-A).

 NOTE : Each capacitive fuel probe is supplied with an alternating
____ current drive, of 30 volts at 30 kilo-hertz, from the FQIC. The fuel probes in a tank group (harness) share the drive and drive return (two aircraft wires) between the FQIC rack connector and the fused connector 4043VC-A (4044VC-A). The fused connector is adjacent to and below its related tank wall connector. In the fused connector:
 - the drive wire divides to supply each of the related fuel probes, in parallel

 - the drive return wire also divides to connect to each of the

 related fuel probes, in parallel through a fuse. All of the discrete drive and drive return wires then go to the tank wall connector 4040VC1(2)-A. Diodes located in the terminal housing of the fuel probe half wave rectify the output signals. The negative going, dc current signals (from fuel probe 4 and the related C.I.C. probe 4 section) are routed directly from the tank wall connector 4040VC1(2)-A to the FQIC rack connector.
 (6) Use a multimeter to do a check for continuity, of the related in line fuses (Ref. ASM 28-42/07) ((Ref. ASM 28-42/08)) between:

 (a) The pins K and L.

 (b) The pins K and Z.

 (7) If the continuity test shows:

 (a) The two fuses have continuity (serviceable), install the serviceable fused connector and continue with step (8).

 (b) One fuse or two fuses are open circuit (first time unserviceable):

 1 Replace the fused connector 4043VC-A(4044VC-A) with a
_
 serviceable item.

 2 Do the test given in Para. 3.B.
_
 (c) One fuse or two fuses are open circuit (second time unserviceable):
 1 Continue with step (8), only replace the fused connector
_ 4043VC-A (404044VC-A) when the cause of the short circuit has been identified and corrected.
 「一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一1R EFF : 001-049, 051-099, 101-149, 151-199, ∞∞28-42-00∞∞∞∞∞∞∞∞∞∞Page 280
 201-299, 401-499, Aug 01/05 CES

 (8) Get access to the tank wall connector 4040VC1(2)-A and the fused connector 4043VC-A(4044VC-A) (Ref. AMM TASK 28-42-43-000-008).

 (a) Disconnect the:
 - tank wall connector 4040VC1(2)-A

 - fused connector 4043VC-A(4044VC-A).

 (9) Remove the FQIC 3QT (Ref. AMM TASK 28-42-34-000-001).

 (10) Do a visual inspection and electrical tests of the aircraft wiring (Ref. AWM 28-42-11) ((Ref. AWM 28-42-10)) and (Ref. AWM 28-42-13) ( (Ref. AWM 28-42-12)) between the FQIC rack connector 3QT-A and the tank wall connector 4040VC1-A(4040VC2-A) as follows:
 (a) Visual Inspection Make sure that good lighting is available. Do a visual inspection and look for distortion (bent, pinched or stretched), damage (broken, chafed or cut), discoloration, overheating (burnt, melted or arcing), liquid contamination, loose electrical connection, or incorrect assembly of the items that follow:
　
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