Brantly B-2B N9011R

Summary

On 4 July 2010 at about 22:45 local time, a Brantly B-2B registered N9011R was involved in an accident near East Troy, Wisconsin, 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

4 July 2010 at 22:45

Classification

Accident

Location

East Troy, Wisconsin, United States

Nearest airport

East Troy Municipal Airport (57C)

Coordinates

42.7972, -88.3725

Aircraft

Brantly B-2B

Registration

N9011R

Category

Helicopter

Engines

1

Operator

Not recorded

Operating rule

Part 91: General Aviation

Purpose of flight

Flight Test

Phase of flight

Not recorded

Route

East Troy → East Troy

Aircraft damage

Substantial

Weather

VMC

Light

Day

NTSB number

CEN10CA371

Nobody was injured.

The pilot's failure to maintain control during landing.

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

Read the full NTSB narrative

The helicopter pilot performed a straight-in autorotation to runway 18 for a rotor rpm check. The engine rpm began to rapidly increase and the pilot rolled the throttle completely off and lowered collective. He reported that the left skid was coming off the ground and he applied full left cyclic and full down collective. The aircraft teetered and continued to roll right. The pilot stated that the helicopter had an articulated landing gear system. He said that the struts travel approximately seven to eight inches and “if only one side retracts it causes a ‘rolling moment’.” About 22 minutes before the accident, the recorded winds about seven nautical miles and 155 degrees from the accident site were 200 degrees at 14 knots with gusts to 32 knots. An examination of the accident helicopter’s controls and landing gear revealed no preexisting anomalies.

Quoted verbatim from the NTSB record.