TM 1-1520-238-T-6
9–526
9–249. CIRCUIT PROTECTION SYSTEM (DC ESSENTIAL BUS 3 – CPG STATION) –
9–249
MAINTENANCE OPERATIONAL CHECK (cont)
WARNING
Avoid touching circuit breaker panels to airframe, or crossing circuit
breaker terminals with any tools. Failure to do so could result in death or
serious injury.
NOTE
If referenced out of one paragraph or volume into another for additional
troubleshooting, upon completion of the task, return to the maintenance
operational check for the original paragraph or volume.
1. Perform the maintenance operational check as follows:
Task
Result
a. On CPG circuit breaker panel 1 (fig. 9–187),
close AWS AWS DC (CB12) circuit breaker.
b. On pilot ELEC PWR panel (fig. 9–186), set
BATT/EXT PWR switch to EXT PWR.
c. On CPG circuit breaker panel 1 (fig. 9–187),
check that the following circuit breaker
panels are closed:
FC FCC DC (CB4),
AWS AWS DC (CB12),
MSL DC ELEC (CB17),
MUX CPG (CB15),
MUX L PYLON OUTBD (CB2),
MUX L PYLON INBD (CB1),
MUX R PYLON INBD (CB5),
MUX R PYLON OUTBD (CB6),
MUX FAB L (CB10),
MUX FAB R (CB9).
If FC FCC DC circuit breaker (CB4) does not stay
closed, go to paragraph 9–251.
If AWS AWS DC circuit breaker (CB12) does not stay
closed, go to paragraph 9–252.
If MSL DC ELEC circuit breaker (CB17) does not stay
closed, go to paragraph 9–253.
If MUX CPG circuit breaker (CB15) does not stay
closed, go to paragraph 9–254.
If MUX L PYLON OUTBD circuit breaker (CB2) does
not stay closed, go to paragraph 9–255.
If MUX R PYLON INBD circuit breaker (CB1) does
not stay closed, go to paragraph 9–256.
If MUX R PYLON INBD circuit breaker (CB5) does
not stay closed, go to paragraph 9–257.
If MUX R PYLON OUTBD circuit breaker (CB6) does
not stay closed, go to paragraph 9–258.
