TM 1-1520-238-T-6
9–227
9–51.
EXTERNAL POWER – DOES NOT COME THROUGH EXTERNAL
9–51
POWER CONTACTOR (cont)
8. Check for open between:
P433-A1 and P172-B7,
P172-B8 and P439-B6.
Does open exist?
YES
Repair open wire.
Go to paragraph 9–47.
NO
Go to step 9.
9. On pilot ELEC PWR panel, set BATT/EXT PWR
switch to EXT PWR. Check for open between
(A125):
J1-B7 and J1-B8.
Does open exist?
YES
Replace pilot ELEC PWR panel
(TM 1-1520-238-23).
NO
Go to step 10.
10. Check for open between (A402):
J21-B6 and P5-10,
P5-9 and XK7-A1.
Does open exist?
YES
Repair open wire.
Go to paragraph 9–47.
NO
Go to step 11.
11. Check for open between (A402):
K7-A1 and K7-X1,
K7-X2 and K7-B2,
K7-X1 and K7-X2.
Does open exist?
YES
Replace external power
contactor (TM 1-1520-238-23).
NO
Go to step 12.
12. Check for open between (A402):
XK7-A2 and P5-3,
P5-4 and P5-5,
P5-6 and GS5-J.
Does open exist?
YES
Repair open wire.
Go to paragraph 9–47.
NO
Go to step 13.
13. Check for open between (A402)K1:
J1-5 and J1-6.
Does open exist?
YES
Replace generator 1 contactor
(TM 1-1520-238-23).
NO
Replace external power
contactor (TM 1-1520-238-23).
END OF TASK
