No fatalities

4 Aug 2010: SCHWEIZER 269C — City of Jacksonville Mosquito Control — Baldwin, FL

Baldwin, FL, United States

On 4 Aug 2010, a SCHWEIZER 269C operated by City of Jacksonville Mosquito Control was involved in an aviation accident near Baldwin, FL. No fatalities were reported. Investigators recorded the probable cause as: A loss of tail rotor effectiveness during a hover. This summary draws on records from NTSB; 12 related events involving the same aircraft type or operator are linked below.

SourcesNTSBPrimary reportUpdated 1778583330Data APIEditorial standards

A helicopter rolled onto its side after the nose yawed right during a hover over tall vegetation on a mosquito breeding inspection flight. The pilot reported no mechanical malfunctions and recommended avoiding such conditions.

Accident Details

During a mosquito breeding inspection flight, the pilot entered a hover approximately 2 feet above a field of tall vegetation. Within 10 to 15 seconds, the nose of the helicopter began to yaw to the right. The pilot applied full left anti-torque pedal and attempted to enter translational lift, but the helicopter continued to rotate. The right skid contacted the ground, and the helicopter rolled onto its side, sustaining substantial damage to the main rotor blades, fuselage, and skids.

Pilot's Report

The pilot reported that there were no mechanical malfunctions of the helicopter prior to the accident. He recommended that conducting inspections during a cooler part of the day, with the presence of wind, or while moving forward could have prevented the accident.

Weather Conditions

At the time of the accident, an airport weather station located about 6 miles southeast of the accident site reported winds variable at 5 knots and a temperature of 31 degrees Celsius.

Contributing factors

Causes

Capability exceeded

Other contributing factors

Effect on equipment