What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
During engineering testing of the cross-wind capabilities of the unmanned rotorcraft, the engineer made an input error to the tail rotor configuration software that caused the tail rotor to lock in full deflection. The remote pilot was unable to maintain control and the rotorcraft impacted the ground. There were no injuries or personal property damage.
As the FAA filed it
DURING ENGINEERING TESTING OF THE CROSS-WIND CAPABILITIES OF THE UNMANNED ROTORCRAFT, THE ENGINEER MADE AN INPUT ERROR TO THE TAIL ROTOR CONFIGURATION SOFTWARE THAT CAUSED THE TAIL ROTOR TO LOCK IN FULL DEFLECTION. THE REMOTE PILOT WAS UNABLE TO MAINTAIN CONTROL AND THE ROTORCRAFT IMPACTED THE GROUND. THERE WERE NO INJURIES OR PERSONAL PROPERTY DAMAGE.
NTSB investigation
The NTSB’s investigation of this event, with its probable cause and findings. Matched to this report by N-number and date.