Robinson R44 N441ML

Summary

On 13 December 2017 at about 21:10 local time, a Robinson R44 registered N441ML was involved in an accident near Newark, Ohio, United States. One person was on board and one had minor injuries. The aircraft was substantially damaged. The NTSB has published a probable cause for this accident; it is quoted in full below.

Date

13 December 2017 at 21:10

Classification

Accident

Location

Newark, Ohio, United States

Nearest airport

Newark-Heath (VTA)

Coordinates

40.0231, -82.4639

Aircraft

Robinson R44

Registration

N441ML

Category

Helicopter

Year built

2004

Engines

1

Operator

Not recorded

Operating rule

Part 91: General Aviation

Purpose of flight

Positioning

Phase of flight

Not recorded

Route

Wise → Newark

Aircraft damage

Substantial

Weather

VMC

Light

Day

NTSB number

GAA18CA089

1 person had minor injuries.

The pilot’s failure to maintain lateral control of the helicopter during takeoff, which resulted in dynamic rollover.

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

Read the full NTSB narrative

The pilot reported that he was relocating the helicopter from the fueling station to an overnight parking area. He initially attempted to move the helicopter on wheels but was unsuccessful. He then started the helicopter, performed the startup checklist, and applied a "normal amount of collective," but the helicopter rolled to the right and impacted the ground. The helicopter sustained substantial damage to the fuselage and tailboom. The automated weather observation station located on the airport reported that, about 16 minutes before the accident, the wind was from 160° at 5 knots. In a followup conversation with the National Transportation Safety Board investigator-in-charge, the pilot reported that the helicopter began rolling to the right immediately after lifting off and that he added power to increase the altitude and applied left cyclic to counteract the right rolling movement. He estimated that the accident sequence took only seconds. The Federal Aviation Administration's Helicopter Flying Handbook, FAA-H-8083-21A, contained a section titled, "Normal Takeoffs and Landings," which stated: Dynamic rollover is possible even during normal takeoffs and landings on relatively level ground, if one wheel or skid is on the ground and thrust (lift) is approximately equal to the weight of the helicopter. If the takeoff or landing is not performed properly, a roll rate could develop around the wheel or skid that is on the ground. When taking off or landing, perform the maneuver smoothly and carefully adjust the cyclic so that no pitch or roll movement rates build up, especially the roll rate. If the bank angle starts to increase to an angle of approximately 5-8°, and full corrective cyclic does not reduce the angle, the collective should be reduced to diminish the unstable rolling condition. Excessive bank angles can also be caused by landing gear caught in a tie down strap, or a tie down strap still attached to one side of the helicopter. Lateral loading imbalance (usually outside published limits) is another contributing factor.

Quoted verbatim from the NTSB record.