"The plane was flying at 11,000ft when the drone was spotted passing the right wing "very quickly" by the first officer on 4 August."
11,000ft? Coincidence?..
Drone Breaks Record (And the Law) By Flying to 11,000 Feet
A European drone hobbyist has apparently flown a DJI Phantom 2 to a record 11,000 feet up. It takes about three-and-a-half minutes to reach that altitude, and once the drone gets up there, the operator has to race the aircraft back to the surface before the remaining 27% of battery life runs out, making it just in time with 4% left, according to the video.
This is almost certainly the record for the highest anyone has flown a commercial drone.