Visakhapatnam: A trial drone operated by Redwing crashed in the Agency area of Alluri Sitarama Raju Manyam district near Boithili village in G. Madugula mandal during a test run for medical delivery services, triggering panic among tribal residents, officials said on Friday.The incident occurred in the Paderu constituency when the drone, flying at an altitude of about 400 feet, reportedly developed an airspeed deviation and lost stability.