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NTSB Final Report: Big Pine, FL

 

Location:

Big Pine, FL

Accident Number:

GAA19CA209

Date & Time:

04/12/2019, 1138 EDT

Registration:

N173MS

Aircraft:

Bell 206

Aircraft Damage:

Substantial

Defining Event:

Loss of control on ground

Injuries:

1 None

Flight Conducted Under:

Public Aircraft


Analysis 

The pilot reported that, after the fourth aerial application flight of the day, he landed and positioned the helicopter near the autoloader boom truck. He reduced engine power to flight idle, and the ground crew began the loading process. He verified that the collective position was full down and the cyclic friction was on, and he then exited the helicopter to stretch while maintaining one hand on the cyclic. The pilot reported that, immediately after, while standing next to the helicopter, he heard two "loud bangs." He immediately boarded the helicopter, the ground crew secured the truck's boom, and the pilot shut down the engine.

Examination revealed that a main rotor blade had struck the truck's boom arm and that the main rotor blades sustained substantial damage.

The director of aerial operations reported that there were no preaccident mechanical failures or malfunctions with the helicopter that would have precluded normal operation.

Probable Cause and Findings

The National Transportation Safety Board determines the probable cause(s) of this accident to be:

The pilot's failure to maintain helicopter control while it was being reloaded with the rotors turning in gusting wind conditions, which resulted in a rotor strike with ground equipment. 

Findings

Personnel issues

Aircraft control - Pilot (Cause)

Environmental issues

Ground equipment - Effect on operation (Cause)

Gusts - Effect on operation (Cause)

Factual Information

History of Flight

Standing-engine(s) operating

Loss of control on ground (Defining event)

Collision with terr/obj (non-CFIT)

Aircraft servicing event

 

 

Pilot Information

Certificate:

Commercial; Private

Age:

56, Male

Airplane Rating(s):

Multi-engine Land; Single-engine Land

Seat Occupied:

Right

Other Aircraft Rating(s):

Helicopter

Restraint Used:

 

Instrument Rating(s):

Airplane

Second Pilot Present:

No

Instructor Rating(s):

None

Toxicology Performed:

No

Medical Certification:

Class 2 With Waivers/Limitations

Last FAA Medical Exam:

03/18/2019

Occupational Pilot:

Yes

Last Flight Review or Equivalent:

04/04/2018

Flight Time:

(Estimated) 4212 hours (Total, all aircraft), 1613 hours (Total, this make and model), 3610 hours (Pilot In Command, all aircraft), 31 hours (Last 90 days, all aircraft), 18 hours (Last 30 days, all aircraft), 3 hours (Last 24 hours, all aircraft)

 

 

Aircraft and Owner/Operator Information

Aircraft Make:

Bell

Registration:

N173MS

Model/Series:

206 L4

Aircraft Category:

Helicopter

Year of Manufacture:

2000

Amateur Built:

No

Airworthiness Certificate:

Normal

Serial Number:

52256

Landing Gear Type:

High Skid

Seats:

6

Date/Type of Last Inspection:

12/20/2018, Annual

Certified Max Gross Wt.:

4450 lbs

Time Since Last Inspection:

 

Engines:

1 Turbo Shaft

Airframe Total Time:

3039.5 Hours as of last inspection

Engine Manufacturer:

Rolls Royce

ELT:

C126 installed, not activated

Engine Model/Series:

250-C30P

Registered Owner:

Florida Keys Mosquito Control District

Rated Power:

650 hp

Operator:

Florida Keys Mosquito Control District

Operating Certificate(s) Held:

None

 

Meteorological Information and Flight Plan

Conditions at Accident Site:

Visual Conditions

Condition of Light:

Day

Observation Facility, Elevation:

KMTH, 8 ft msl

Distance from Accident Site:

18 Nautical Miles

Observation Time:

1553 UTC

Direction from Accident Site:

90°

Lowest Cloud Condition:

Few / 1900 ft agl

Visibility

10 Miles

Lowest Ceiling:

 

Visibility (RVR):

 

Wind Speed/Gusts:

9 knots / 15 knots

Turbulence Type Forecast/Actual:

None / None

Wind Direction:

130°

Turbulence Severity Forecast/Actual:

N/A / N/A

Altimeter Setting:

29.99 inches Hg

Temperature/Dew Point:

31°C / 23°C

Precipitation and Obscuration:

No Obscuration; No Precipitation

Departure Point:

Marathon, FL (MTH)

Type of Flight Plan Filed:

None

Destination:

Marathon, FL (MTH)

Type of Clearance:

None

Departure Time:

0843 EDT

Type of Airspace:

Class G

 

 

Wreckage and Impact Information

Crew Injuries:

1 None

Aircraft Damage:

Substantial

Passenger Injuries:

N/A

Aircraft Fire:

None

Ground Injuries:

N/A

Aircraft Explosion:

None

Total Injuries:

1 None

Latitude, Longitude:

24.727222, -81.390000 (est)

  


Administrative Information

Investigator In Charge (IIC):

Eleazar Nepomuceno

Report Date:

03/03/2020

Additional Participating Persons:

 

Publish Date:

03/03/2020

Note:

This accident report documents the factual circumstances of this accident as described to the NTSB.

Investigation Docket:

http://dms.ntsb.gov/pubdms/search/dockList.cfm?mKey=99275





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