TM 1-1520-238-T-6
9382
9150. CIRCUIT PROTECTION SYSTEM (AC ESSENTIAL BUS 1 PILOT STATION)
9150
MAINTENANCE OPERATIONAL CHECK (cont)
1. Perform the maintenance operational check as follows:
Task
Result
a. On electrical power distribution box, detach
P1, P2, and P3.
b. Check for short between:
P3-G and ground,
P3-H and ground,
P3-J and ground,
P3-K and ground,
P3-L and ground,
P3-M and ground,
P3-N and ground,
P3-P and ground,
P3-R and ground.
If short exists, go to paragraph 9152.
c. On pilot ELEC PWR panel (fig. 9157), set
BATT/EXT PWR switch to EXT PWR.
M69-197
BATT / EXT PWR
SWITCH
Figure 9157.
Pilot ELEC PWR Panel
d. On electrical power distribution box, check
for 115 VAC at (A402):
J3-G,
J3-H,
J3-J,
J3-K,
J3-L,
J3-M,
J3-N,
J3-P,
J3-R.
If 115 VAC is not present, go to paragraph 9153.
e. On pilot ELEC PWR panel, set BATT/EXT
PWR switch to OFF and attach P1, P2, and
P3 on electrical power distribution box.
f. On pilot ELEC PWR panel, set BATT/EXT
PWR switch to EXT PWR.