NOTE : It is important that the fuel pump supply cable is
____ installed correctly as given in steps b_ thru f_. Incorrect installation of the cable can cause it to get damaged. If the cable is too short it will put tension on the wires and plug. If the cable is too long you will not be able to install the fairings correctly. This is because the unwanted cable (excess length) will become looped and get trapped during the installation of the intermediate and rear fairings.
7 In the cockpit (right rear) do a visual inspection as
_ specified in step (j)2_ of the items that follow, replace if necessary:
a The C/B-FUEL/R WING TK/PUMP 2 SPLY (8QA) at the C/B panel
_
121VU (Ref. AWM 93-01-21).
b The connector 2216VC-A and related receptacle at the panel
_
120VU (Ref. AWM 93-01-20).
8 Release the front face of the C/B panel 121VU and lower to the
_
open (horizontal) position.
9 Use a multimeter and make sure that each of the 115VAC three
_ phases are available at the C/B-8QA input and output terminals (Ref. ASM 28-21/02).
10 If the 115VAC supply to the C/B-8QA, is not available at
__ terminals A1, B1 and C1 trouble shoot the AC supply (Ref. TSM 24 PB 101).
11 If, with the C/B-8QA closed, the 115VAC supply is not
__ available at the terminals A2, B2 and C2, replace the C/B-FUEL/R WING TK/PUMP 2 SPLY (8QA).
12 Raise the front face of the C/B panel 121VU to the closed
__ (vertical) position and secure.
13 In the forward avionics bay remove the front cover of the
__ contactor box 107VU (Ref. AWM 93-01-07).
14 Do a visual inspection as specified in step (j)2_ and replace,
__ if necessary:
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a The CNTOR-R WING TK PUMP 2 SPLY (20QA).
_
b_ The connector 1262VC-A and related receptacle.
15__ Remove the contactor 20QA.
16__ Use a multimeter and make sure that each of the 115VAC three phases are available at the contactor base input sockets (8, 6 and 2) (Ref. ASM 28-21/02).
17__ If the 115VAC supply to the contactor 20QA is not available, do a test of the aircraft wiring (three phase supply) between the C/B-FUEL/R WING TK/PUMP 2 SPLY (8QA) and the CNTOR-R WING TK PUMP 2 SPLY (20QA) (Ref. ASM 28-21/02). Do the test as follows:
a_ Continuity test, with a multimeter, of each three phase wire (from end to end) (Ref. ESPM 20-52-21).
b_ Insulation test, with a 500VDC insulation tester, between each phase wire (pole) and ground (Ref. ESPM 20-52-24).
c_ Insulation test, with a 500VDC insulation tester, between each phase wire and the other two wires (pole to pole) (Ref. ESPM 20-52-24).
d_ Repair/replace the unserviceable wiring and connectors.
e_ Install the contactor 20QA.
f_ Install the the front cover of the contactor box 107VU.
18__ If the 115VAC supply is available, replace the CNTOR-R WING TK PUMP 2 SPLY (20QA) with a serviceable item.
19__ Set the R TK PUMPS 2 P/BSW (16QA) to ON (push in). This will energize the contactor 20QA and the 115VAC three phases will be supplied to the fuel pump connector 26QA-A.
20__ Use a multimeter to do a test, to make sure that each of the 115VAC three phases are available at the connector 26QA-A (Ref. ASM 28-21/02).
21__ Set the R TK PUMPS 2 P/BSW (16QA) to OFF (release out). This will de-energize the contactor 20QA.
22__ If the 115VAC is available at the end connector 26QA-A:
a_ Install the front cover of the contactor box 107VU.
b_ Connect the end connector 26QA-A to the fuel pump receptacle.
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23
__
c Do the test given in Para. 3.B.(2)(b).
_
If the 115VAC is not available at the end connector 26QA-A, do a test of the aircraft wiring (three phase supply) between the CNTOR-R WING TK PUMP 2 SPLY (20QA) and the PUMP-FUEL No. 2, R WING TK (26QA) free connector (26QA-A) (Ref. ASM 28-21/02).
NOTE : If necessary, you can divide the supply cable between
____ the contactor 20QA and the connector 26QA-A into two sections at the connector 4010VC (Ref. AWM 28-21-04).
Do the test as follows:
a Continuity test, with a multimeter, of each three phase
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