Airbus A350 N350ST

Summary

On 18 February 2019 at about 23:55 local time, a Airbus A350 registered N350ST, operated by Rota Aviation Consulting Llc, was involved in an accident near Eureka, Alaska, United States. One person was on board and nobody was injured. The aircraft was substantially damaged. The NTSB has published a probable cause for this accident; it is quoted in full below.

Date

18 February 2019 at 23:55

Classification

Accident

Location

Eureka, Alaska, United States

Coordinates

61.7742, -147.1233

Aircraft

Airbus A350

Registration

N350ST

Category

Helicopter

Year built

1993

Engines

1

Operator

Rota Aviation Consulting Llc

Operating rule

Part 135: Air Taxi & Commuter

Phase of flight

Not recorded

Route

Sutton → Sutton

Aircraft damage

Substantial

Weather

VMC

Light

Day

NTSB number

GAA19CA139

Nobody was injured.

The pilot's selection of unsuitable terrain for landing on snow-covered mountainous terrain with steep rocks above, which resulted in loose rocks damaging the main rotor blades and the subsequent loss of helicopter controllability. 

Quoted verbatim from the NTSB record. This site does not paraphrase or interpret it.

Read the full NTSB narrative

The helicopter pilot reported that, while transporting snow skiers, he landed on a 20º slope below the mountain peak, where he directed the guide and two skiers to unload with the engine running. The pilot saw loose rocks from the peak above fall into the main rotor disk, and after the skiers were clear of the helicopter, he raised the collective and brought the helicopter to a hover. He added that, while hovering, he did not feel any controllability issues, so he repositioned the helicopter up the mountain about 30 ft and "toed in" to unload additional skiers. After the remaining skiers unloaded, the pilot started flying the helicopter down the mountain so that he could shut down the engine and examine the main rotor blades. The pilot added that, about 10 seconds later, the helicopter began to shake violently. He initiated a forced landing, but about 150 ft above the trees, the "flight controls became progressively hard to control," and the helicopter pitched up. Immediately, he lowered the nose and collective, and about 30 ft above the snow-covered ground, the main rotor disk struck trees, and the helicopter subsequently impacted terrain. The helicopter sustained substantial damage to the main rotor blades, fuselage, tailboom, and tail rotor blades. The director of operations reported that there were no preaccident mechanical failures or malfunctions with the helicopter that would have precluded normal operation.

Quoted verbatim from the NTSB record.