TM 1-1520-238-T-6
9–416
9–172. CIRCUIT PROTECTION SYSTEM (AC ESSENTIAL BUS 1 – CPG STATION) –
9–172
MAINTENANCE OPERATIONAL CHECK (cont)
Task
Result
k. On CPG circuit breaker panel 1
(fig. 9–161), check that
AWS AWS AC (CB11),
MSL R LCHR AC (CB18),
MSL R LCHR AC (CB21),
MSL L LCHR AC (CB24),
MSL L LCHR AC (CB26),
FC FCC AC (CB16), and ATTD IND (CB20)
circuit breakers are closed.
If AWS AWS AC circuit breaker (CB11) does not stay
closed, go to paragraph 9–176.
If MSL R LCHR AC circuit breaker (CB18) does not
stay closed, go to paragraph 9–177.
If MSL R LCHR AC circuit breaker (CB21) does not
stay closed, go to paragraph 9–178.
If MSL L LCHR AC circuit breaker (CB24) does not
stay closed, go to paragraph 9–179.
If MSL L LCHR AC circuit breaker (CB26) does not
stay closed, go to paragraph 9–180.
If FC FCC AC circuit breaker (CB16) does not stay
closed, go to paragraph 9–181.
If ATTD IND circuit breaker (CB20) does not stay
closed, go to paragraph 9–182.
l. On pilot ELEC PWR panel (fig. 9–162), set
BATT/EXT PWR switch to OFF.
m. On CPG circuit breaker panel 1, detach
P766, P767, and P769.
n. On pilot ELEC PWR panel, place BATT/EXT
PWR switch to EXT PWR.
o. Check for 115 VAC at P769-L.
If 115 VAC is not present, go to paragraph 9–175.
p. (AAK) Check for 115 VAC at P767-30 and
P767-31.
(ABQ) Check for 115 VAC at P767-31.
If 115 VAC is not present, go to paragraph 9–183.
q. On pilot ELEC PWR panel, place BATT/EXT
PWR switch to OFF.
r. Check for continuity between (A77):
J4-L, J2-12, and J2-19.
If continuity does not exist, go to paragraph 9–176.
s. Check for continuity between (A77):
J2-31 and J2-5.
If continuity does not exist, go to paragraph 9–177.
t. Check for continuity between (A77):
J2-31 and J2-4.
If continuity does not exist, go to paragraph 9–178.
u. Check for continuity between (A77):
J2-31 and J2-3.
If continuity does not exist, go to paragraph 9–179.
v. Check for continuity between (A77):
J2-31 and J2-2.
If continuity does not exist, go to paragraph 9–180.
