What happened
During the landing roll, the pilot reported that the airplane began to veer to the left. In response, the pilot applied hard right brake; however, the airplane continued to travel to the left and off the runway. A controller on duty at the time of the accident reported that the airplane ballooned prior to veering to the left. The pilot reported that there were no mechanical failures or malfunctions with the airplane prior to the accident.
The investigation
No further investigation details are provided in the source text regarding mechanical examination or physical evidence collection beyond the immediate witness and pilot accounts.
Findings
The primary finding is that the aircraft departed the runway surface during the landing roll. Contributing factors included an uncommanded left veer and a reported ballooning event prior to the veer. The pilot confirmed the absence of mechanical failures or malfunctions with the airplane prior to the accident.
Safety message
No explicit safety message is stated in the source text.