Yes it will, autopilot just keeps the heading and the altitude. There may be other sensors onboard that help with detections (it is a lot more expensive after-

Yes it will, autopilot just keeps the heading and the altitude. There may be other sensors onboard that help with detections (it is a lot more expensive after-all) but the autopilot control system does no such thing. Even with all the sensors onboard, the 747 would most likely run into something without assistance, in fact I've seen a few cases of this on Air Disasters.