APU OPERATING INSTRUCTIONS USING BATTERY POWER continued
ac. Verify switch positions on CPG FIRE CON-
TROL panel (25) and data entry keyboard
(1) MUX switch (27) is set to PRI.
(2) FCC/MUX switch (28) is set to ON.
(3) SYSTEM FC SYM GEN switch (29) is set to
FC SYM GEN.
(4) SYSTEM TADS switch (30) is set to OFF.
(5) DATA ENTRY switch is (31) set to STBY .
If XMSN 1 and XMSN 2 temperature
exceed 130 C (266 F), shut down
APU. Allow the transmission fluid to
cool for 30 minutes prior to resuming
APU ground operations; or transmis-
sion fluid may be cooled by authorized
personnel operating engine with turn-
Do not operate the APU for more than
5 minutes at a main transmission oil
temperature of 120 C (248 F). Shut
down APU to prevent damaging ac-
cessory gear box components.
The main transmission oil temperature
and pressure can be viewed on the
CPG heads out display (HOD) or any
selected pilot/CPG crewstation video
If ECS air temperature is very warm
and cannot be adjusted with TEMP
control, shutdown APU.
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