TM 1-1520-238-T-6
9–386
9–150.
CIRCUIT PROTECTION SYSTEM (AC ESSENTIAL BUS 1 – PILOT STATION) –
9–150
MAINTENANCE OPERATIONAL CHECK (cont)
Task
Result
x. Check for 115 VAC at P1-45.
If 115 VAC is not present, go to paragraph 9–162.
y. Check for 115 VAC at P1-44.
If 115 VAC is not present, go to paragraph 9–163.
z. Check for 115 VAC at P1-24.
If 115 VAC is not present, go to paragraph 9–164.
aa. Check for 115 VAC at P1-26.
If 115 VAC is not present, go to paragraph 9–160.
ab. Check for 115 VAC at P1-54.
If 115 VAC is not present, go to paragraph 9–165.
ac. Check for 115 VAC at P1-30.
If 115 VAC is not present, go to paragraph 9–157.
ad. Check for 115 VAC at P1-28.
If 115 VAC is not present, go to paragraph 9–158.
ae. Check for 115 VAC at P1-22.
If 115 VAC is not present, go to paragraph 9–168.
af. Check for 115 VAC at P1-36.
If 115 VAC is not present, go to paragraph 9–169.
ag. Check for 115 VAC at P1-37.
If 115 VAC is not present, go to paragraph 9–170.
ah. On pilot ELEC PWR panel (fig. 9–157), set
BATT/EXT PWR switch to OFF.
ai. On electrical power distribution box, attach
P1 and detach P3.
aj. On pilot aft circuit breaker panel (fig. 9–158),
check that POWER XFMR RECT 1 circuit
breaker (CB1) is closed.
If POWER XFMR RECT 1 circuit breaker (CB1) does
not stay closed, go to paragraph 9–167.
ak. On electrical power distribution box, attach
P3.
2. Perform EXTERNAL POWER – POWER DOWN (para 9–46).
END OF TASK
