Originally Posted by
Cabotage
Chaps, can we discuss the precautions of losing ground power (whilst on the ground) on the 737.
Obviously yaw damper switches off, voice recorder to auto and autobrake disarm light illuminates.
What other considerations are there? The ground horn warning will sound after a certain time?
Is there a time frame where the power needs to be restored before losing all of the FMC data input?
If ground power cannot be restored, it's best to start the APU.
What “precautions” do you want to take? If the GND pwr does not hang in there, just start the APU. Unless…