TM 1-1520-238-23
Change 2
1-246.3
1.74.
APU OPERATING INSTRUCTIONS – USING BATTERY POWER – continued
CAUTION
Ensure fire bottle select switch PRI/RES
is centered or fire bottle may discharge.
w. Check APU fire detection system.
(1) Set FIRE TEST DET switch (14) on APU fire
test panel (15) to 1.
(2) Verify FIRE APU light (16) on master caution
warning panel (17) is lighted.
(3) Verify APU FIRE PULL handle light (18) on
APU fire test panel (15) is lighted.
(4) Set FIRE TEST DET switch (14) on APU fire
test panel (15) to 2.
(5) Verify FIRE APU light (16) and APU FIRE
PULL light (18) are lighted.
(6) Set FIRE TEST DET switch (14) on APU fire
test panel (15) to OFF.
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M04-1601-14
PILOT STATION
PRI
RES
M04-1601-10A
14
18
15
16
17
