The remainder of the messages occurred from 02:11 UTC to 02:14 UTC, containing a fault message for an Air Data Inertial Reference Unit (ADIRU) and the Integrated Standby Instrument System (ISIS).   At 02:12 UTC, a warning message NAV ADR DISAGREE indicated that there was a disagreement between the three independent air data systems . [d] At 02:13 UTC, a fault message for the flight management guidance and envelope computer was sent.  One of the two final messages transmitted at 02:14 UTC was a warning referring to the air data reference system, the other ADVISORY was a "cabin vertical speed warning", indicating that the aircraft was descending at a high rate.    
Logistically, some sort of air traffic control system is going to need to be in place if the future is really going to include drone package delivery, medical drones , internet-delivery drones , and, of course, massive police surveillance . The skies are going to get too crowded and it’s too easy for bad actors to use drones for nefarious purposes . Even when people have no ill intent, the remote-controlled devices can cause chaos. Earlier this week , two planes fighting wildfires in Colorado had to prematurely drop their flame-retardant payloads because of drones flying in the area—a screwup that cost the US Forest Service somewhere between $16,000 and $20,000.