TM 1-1520-238-T-4
4–150
4–59.
ENGINE 1 DOES NOT RESTART – CKT A AND CKT B SWITCHES RELEASED (cont)
4–59
7. Check for open between P977–A9 and ground.
Does open exist?
YES
Repair open wire.
Go to paragraph 4–12.
NO
Go to step 9.
8. Check for open between:
P21–17 and P45–17,
P21–18 and P45–18,
P21–19 and P45–19.
Does open exist?
YES
(ABY) Repair open wire.
Go to paragraph 4–12.
(ABZ) Replace wire harness
(TM 1-1520-238-23).
NO
Go to step 10.
9. Check for open between P977–B1 and
P175–18.
Does open exist?
YES
Repair open wire.
Go to paragraph 4–12.
NO
Go to step 12.
10. Check for open between (A330):
XK1–5/6–A2 and XK1–5/6–A3.
Does open exist?
YES
Replace relay (A330)K1–5/6
(TM 1-1520-238-23).
NO
Go to step 11.
11. Remove relay (A330)K1–7/8. Check for open
between (A330):
XK1–7/8–A2 and XK1–7/8–A3.
Does open exist?
YES
Replace relay (A330)K1–7/8
(TM 1-1520-238-23).
NO
Repair open wire between
(A330):
XK1–7/8–A2 and J1–B10,
XK1–7/8–A3 and
XK1–5/6 –A2.
Go to paragraph 4–12.
12. Check for open between:
(A330)XK1–7/8–X2 and ground,
(A330)XK1–7/8–C1 and P175–18.
Does open exist?
YES
Repair open wire.
Go to paragraph 4–12.
NO
Replace pilot EMERG PWR
CHK OVSP TEST panel
(TM 1-1520-238-23).
END OF TASK
