Bell 407 N947LH accident near Minot, North Dakota

Probable cause

The pilot's failure to maintain clearance from fencing around the landing pad during landing, which resulted in the tail rotor contacting the fence.

NTSB analysis

The pilot departed on a positioning flight to pick up a medical crew. As he neared the helipad, he performed a right 180° circling approach. After completing the turn, the pilot thought he was a little low on final approach, and "pulled in a little collective" as he leveled the helicopter, which contacted the landing pad "firmly." Before the subsequent departure, the pilot felt a vibration, and he shut down the helicopter to investigate. The crew walked toward the tail and noticed a slight bend in the lower vertical fin, the tips of both tail rotor blades missing, and the helipad safety fence missing a small section of the fence-edge pipe. Further examination of the helicopter identified cracks in the tail boom structure. A security camera video of the helipad showed that the helicopter's tail rotor impacted the fence during the landing.

Text from the NTSB. Open the NTSB docket for CEN20LA068 for the full record.