Tristan, Perhaps you should read with a little more effort here. You have been going on all along in this topic about crashes with various selections in your FMS. The incorrect NavData can cause such crashes. Javier is in no way indicating this has anything to do with battery or map functionality. To add to that...he specifically quoted a person other than you. This is precisely why we have manuals, Tristan....for our customers to read! In specifics, page 18 of the CRJ flight tutorial (CRJ200_Tutorial_1.1.0.pdf). First bullet point.