CNN Anderson Cooper 360 March 26, 2015 00:11:00
In the cockpit. >> the only way is through a maintenance channel. there's a maintenance communication system. i'm not sure if this aircraft had it or not but most of these airbuses have a communication system for maintenance reporting back to the home base which would be one possibility. >> jim, does it make sense to you why a pilot would leave the cockpit at this point of the flight? >> -- i think we lost jim there. does it make sense why they lost contact at this time? >> we've all flown extensively. it's not uncommon. and there are somewhat looser regulations when you're off the continental...
Source: archive.org