Sikorsky S 58JT N827MW accident near Lebanon, Indiana

Probable cause

The pilot's failure to maintain proper clearance from a tractor trailer during landing.

NTSB analysis

The pilot reported that he conducted a low-reconnaissance flight in the helicopter over the intended landing site, which was just east of a building. Shortly after, he realized that the landing site had changed to west of the building. He maneuvered the helicopter to a hover over the new landing site about 75 ft above ground level and started a vertical descent. During the descent, a company mechanic seated in the left seat told the pilot of an obstacle left of the helicopter. He acknowledged seeing the obstacle and continued to descend. Shortly after touchdown, as the pilot reduced the throttle setting to idle, the main rotor blades struck a tractor trailer, the helicopter yawed, and the tail rotor blades struck the trailer. The helicopter sustained substantial damage to the main rotor and tail rotor systems. The director of operations reported that there were no preaccident mechanical failures or malfunctions with the helicopter that would have precluded normal operation.

Text from the NTSB. Open the NTSB docket for GAA20CA063 for the full record.