The search for wreckage of Malaysia Airlines Flight 370 resumed Wednesday, with search planes traveling to the suspected crash site 1,500 miles off the Australian coast.
Finding this debris is critical when it comes to determining what went wrong. Was it pilot error?
OutFront has been looking at an incident from 2005 involving a Boeing 777 that raises questions about the training pilots are getting.
According to the Australian Transportation Safety Bureau, the incident happened on a flight from Perth to Kuala Lumpur.
It's said to have been an issue with the auto-pilot.
The takeaway from the report: "When the hardware failure occurred, combined with the software anomaly, the crew were faced with an unexpected situation that had not been foreseen. Subsequently, the crew had not been trained to respond to a specific situation of this type..."
Boeing did not return our request for a comment on the incident.
But if there was some sort of mechanical failure with Flight 370 would the pilots have known what to do?
OutFront: Richard Quest, CNN aviation analyst Miles O'Brien, pilot Arthur Rosenberg and Robert Goyer Editor-in-chief of Flying Magazine.