Eurocopter EC120 N372HS

Summary

On 13 June 2016 at about 18:10 local time, a Eurocopter EC120 registered N372HS, operated by Department of Homeland Security, was involved in an accident near Ajo, Arizona, 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

13 June 2016 at 18:10

Classification

Accident

Location

Ajo, Arizona, United States

Coordinates

32.1292, -113.4858

Aircraft

Eurocopter EC120

Registration

N372HS

Category

Helicopter

Year built

2006

Engines

1

Operator

Department of Homeland Security

Operating rule

Public Use

Phase of flight

Not recorded

Route

Yuma → Ajo

Aircraft damage

Substantial

Weather

VMC

Light

Day

NTSB number

GAA16CA318

Nobody was injured.

The pilot's decision to exit the helicopter with the engine and rotors turning and the selection of unsuitable terrain for a landing, which resulted in a roll over.

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

Read the full NTSB narrative

The pilot of a skid equipped helicopter reported that after landing on a volcanic rock hill top, the pilot exited the running helicopter. The pilot further reported that he heard an audible change in the sound of the main rotor and observed the ground under the right skid of the helicopter give way and the helicopter rolled to the right. The helicopter sustained substantial damage to the tail boom. According to the pilot there were no preimpact mechanical failures or malfunctions with the airframe or engine that would have precluded normal operation. The Federal Aviation Administration (FAA) has published FAA-H-8083-21A Helicopter Flying Handbook (2012). This handbook discusses pilots at the flight controls and states in part: "Many helicopter operators have been lured into a "quick turnaround" ground operation to avoid delays at airport terminals and to minimize stop/start cycles of the engine. As part of this quick turn-around, the pilot might leave the cockpit with the engine and rotors turning. Such an operation can be extremely hazardous if a gust of wind disturbs the rotor disk, or the collective flight control moves causing lift to be generated by the rotor system. Either occurrence may cause the helicopter to roll or pitch, resulting in a rotor blade striking the tail boom or the ground. Good operating procedures dictate that, generally, pilots remain at the flight controls whenever the engine is running and the rotors are turning".

Quoted verbatim from the NTSB record.