KLM MD-11 - APU PWR Switch

MD-11 Flight Crew Operations Manual
k
APU -
Controls and Displays
APU.30.3
APU PWR Switch
1. APU PWR Switch - green/blue
Push to start the APU.
AVAIL - Flashes green during start until N2 reaches 95 percent, then
becomes steady green as the APU generator provides power of correct phase
rotation, voltage, and frequency.
If the APU was started from the APU control panel, pushing this switch
supplies APU power to the unpowered generator buses if the green AVAIL
light is illuminated.
After start, APU power is automatically supplied to unpowered generator
buses. When the IDGs are supplying the generator buses, the APU shuts
down 90 seconds after APU air is no longer being used.
ON - Illuminates blue when the APU generator is supplying power to any
generator bus.
If the APU is on and supplying electrical power, pushing this switch
disconnects electrical loads.
If the APU was started from the APU control panel, pushing this switch does
not stop the APU.
DC TIE 3
EMER DC
DRIVE 3
DRIVE 2
GEN 3
AC 3
SYSTEM
CAB BUS
OFF
OFF
OFF
OFF
OFF OFFOFF
OFF
ARM
ON
ON
ON
OFF
ARM
GND SERV
TIE 2
EXT PWR
AVAIL
AVAIL
DISC
DISC
FAULT
FAULT
AC GND SERV
APU PWR
EMER AC
ADG
ELEC
AC
TIE 3
DC 3
1 / 2
R
OFF
OFF
OFF
TURN
SMOKE
ELEC/AIR NORM
/
OFF
/
3
32
1
SELECT
MANUAL
PUSH TO
1
DB1-2-1626
FORWARD OVERHEAD PANEL
October 02, 2006