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# Shutdown

### CHANGEOVER TO EXTERNAL POWER

When parked at ramp:

* Place external power switch on.
* Select essential power and ac power to EXT PWR.

### ENGINE SHUTDOWN

Operate engines at idle RPM for 1 minute before shutdown. Move start levers to CUTOFF, and check that EGT drops, indicating clean shutdown.

### FLIGHT TERMINATION

* Place the ground venturi switch to NORMAL after the first cabin door is open.
* Turn off all cockpit lights excecpt dome and fluorescent lights.
* Place DC METERS selector to ESS TR.
* Place all engine bleed air switches to OPEN position.
* Check radio switch off
* Close both air conditioning pack switches after Secure Cockpit checklist completed
* If APU is in use, let it run for approximately two minutes with no air load before shutdown.
* After APU shutdown turn battery switch off.
* Place EXTERNAL POWER selector to GRD SERVICE.