1
– EXT PWR pushbutton:
AVAIL
illuminates green when conditions of DC external power connection are met
ON
allows to connect DC external power
ATR 42-300
AIRCRAFT HANDLING MANUAL
AIRCRAFT SERVICING
3.3.1 CONNECTING EXTERNAL POWER, FLIGHT DECK MANNED
Before connecting external power, according to the procedure below, you must be aware of the
WARNINGS
and
CAUTIONS
as described in
3.3 EXTERNAL POWER.
Follow these steps to connect external power to the aircraft:
Step
Action
1
Make sure the GPU is switched off electrically.
2
Inspect the external power cable connector and cable for damage.
3
When the aircraft has come to a complete stop:
Open the external power access door
Connect the external power cable connector to the DC
external power receptacle
Make sure the cable connector is fully engaged.
4
Switch on the GPU electrically and check that:
The white “DC Connected” light comes on
3.3.2 DISCONNECTING EXTERNAL POWER, FLIGHT DECK MANNED
Before disconnecting external power, according to the procedure below, you must be aware of the
WARNINGS
and
CAUTIONS
as described in
3.3 EXTERNAL POWER.
Follow these steps to disconnect external power from the aircraft:
Step
Action
1
Make sure the white “DC PWR NOT USED” light is on.
2
Switch off the GPU electrically and check that:
The “DC CNCTD” light is out.
3
Disconnect the external power cable connector.
4
Close the DC external power access door.
5
Stow the external power cable and connector on the GPU
6
Shut down the GPU (when applicable).