TM 1-1520-238-T-6
9–477
9–215. CIRCUIT PROTECTION SYSTEM (DC ESSENTIAL BUS 1 – CPG STATION) –
9–215
MAINTENANCE OPERATIONAL CHECK (cont)
NOTE
Refer to pilot station (fig. 9–174) and CPG station (fig. 9–175) for cockpit
configuration and equipment.
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. Detach P763.
b. On pilot ELEC PWR panel (fig. 9–176), set
BATT/EXT PWR switch to EXT PWR.
BATT / EXT PWR
SWITCH
M69-229
Figure 9–176.
Pilot ELEC PWR Panel
c. Check for 28 VDC at P763-D.
If 28 VDC is not present, go to paragraph 9–217.
d. On pilot ELEC PWR panel, set BATT/EXT
PWR switch to OFF and attach P763.
e. On pilot ELEC PWR panel, set BATT/EXT
PWR switch to EXT PWR.
f. On CPG circuit breaker panel 2 (fig. 9–177),
check that TADS DC circuit breaker (CB2)
and CBR BLWR circuit breaker (CB5) are
closed.
If TADS DC circuit breaker (CB2) does not stay
closed, go to paragraph 9–218.
If CBR BLWR circuit breaker (CB5) does not stay
closed, go to paragraph 9–219.
