Tuesday, August 17, 2021

Dynamic Rollover: Bell 206L-3, N170AM; accident occurred July 09, 2021 in Berlin, Sangamon County, Illinois

Aviation Accident Final Report - National Transportation Safety Board

The National Transportation Safety Board did not travel to the scene of this accident.

Additional Participating Entity:
Federal Aviation Administration / Flight Standards District Office; Springfield, Illinois

Investigation Docket - National Transportation Safety Board:

Premier Rotors LLC

The HeliTeam 

Location: Berlin, Illinois 
Accident Number: CEN21LA432
Date and Time: July 9, 2021, 11:00 Local 
Registration: N170AM
Aircraft: Bell 206L-3 
Aircraft Damage: Substantial
Defining Event: Dynamic rollover 
Injuries: 1 None
Flight Conducted Under: Part 137: Agricultural


The pilot reported that while landing the helicopter on a loading truck, he felt the skids settle and spread. After a few seconds, the helicopter began to slide off the truck. He increased collective in an attempt to move forward away from the truck, but thought that the skid was stuck. The pilot was able to dislodge the skid but the helicopter rolled onto its left side, resulting in substantial damage to the fuselage. The pilot reported no mechanical malfunctions or failures 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 control of the helicopter with a stuck skid, which resulted in a dynamic rollover.


Aircraft Lateral/bank control - Not specified
Personnel issues Aircraft control - Pilot

Factual Information

History of Flight

Maneuvering-hover Loss of control in flight
Maneuvering-hover Dynamic rollover (Defining event)

Pilot Information

Certificate: Commercial 
Age: 35, Male
Airplane Rating(s): None
Seat Occupied: Right
Other Aircraft Rating(s): Helicopter
Restraint Used: 4-point
Instrument Rating(s): Helicopter
Second Pilot Present: No
Instructor Rating(s): Helicopter 
Toxicology Performed:
Medical Certification: Class 2 Without waivers/limitations
Last FAA Medical Exam: June 13, 2021
Occupational Pilot: Yes
Last Flight Review or Equivalent: May 20, 2021
Flight Time: 5500 hours (Total, all aircraft), 550 hours (Total, this make and model), 5000 hours (Pilot In Command, all aircraft), 250 hours (Last 90 days, all aircraft), 50 hours (Last 30 days, all aircraft)

Aircraft and Owner/Operator Information

Aircraft Make: Bell 
Registration: N170AM
Model/Series: 206L-3 NO SERIES 
Aircraft Category: Helicopter
Year of Manufacture: 1982
Amateur Built:
Airworthiness Certificate: Normal; Restricted (Special) 
Serial Number: 51036
Landing Gear Type: Skid 
Seats: 5
Date/Type of Last Inspection: June 3, 2021 100 hour 
Certified Max Gross Wt.: 4150 lbs
Time Since Last Inspection:
Engines: 1 Turbo shaft
Airframe Total Time: 12492.7 Hrs at time of accident
Engine Manufacturer: ALLISON
ELT: Installed, not activated 
Engine Model/Series: 250-C20B
Registered Owner: 
Rated Power: 650 Horsepower
Operating Certificate(s) Held: Agricultural aircraft (137)

Meteorological Information and Flight Plan

Conditions at Accident Site: Visual (VMC)
Condition of Light: Day
Observation Facility, Elevation:
Distance from Accident Site:
Observation Time: 
Direction from Accident Site:
Lowest Cloud Condition: Clear 
Visibility: 10 miles
Lowest Ceiling: 
Visibility (RVR):
Wind Speed/Gusts: 3 knots / 
Turbulence Type Forecast/Actual:  /
Wind Direction: 90° 
Turbulence Severity Forecast/Actual:  /
Altimeter Setting: 
Temperature/Dew Point:
Precipitation and Obscuration:
Departure Point: Berlin, IL
Type of Flight Plan Filed: None
Destination: Berlin, IL
Type of Clearance: None
Departure Time: 
Type of Airspace: Class G

Wreckage and Impact Information

Crew Injuries: 1 None
Aircraft Damage: Substantial
Passenger Injuries:
Aircraft Fire: None
Ground Injuries: 
Aircraft Explosion: None
Total Injuries: 1 None
Latitude, Longitude: 39.764167,-89.982778

ROTORCRAFT: 1982 Bell 206L-3 N170AM, s/n: 51036, Hobbs: 12,445.5

ENGINE:  Allison 250-C30P, S/N CAE95029, TSN: 12170.7

Garmin GNS-530W
Garmin SL-40

The spray equipment and Agnav GPS that were attached to the aircraft at the time of the loss are NOT included with the salvage.

NO spray equipment nor aerial applicator GPS will be included with the salvage.

DESCRIPTION OF ACCIDENT:   On 07/09/21, N170AM  was departing from mobile helipad. During lift off one of the rotorcraft skids caught on a railing on the helipad causing the aircraft to roll onto its side at which time the rotorcraft impacted the ground.                                                     

DAMAGE:  The damage includes but may not be limited to:
main rotor strike
tail rotor strike
fuselage (large tear in the composite metal skin under the area of the transmission/engine; widespread wrinkling/buckling; at least two cracks in skin frame around cockpit's left door; large puncture above forward cross tube; large puncture on aft, right side of fuselage; left side windows cracked/destroyed; aft, left cabin door bent)
both cross tubes (bent)
left step (partially torn from cross tubes)
tailboom (torn from fuselage at root and tail rotor)
tailrotor driveshaft (destroyed)
vertical stabilizers (top crushed)

LOCATION OF AIRCRAFT:    Jacksonville, IL  

Spray equipment and aerial applicator GPS are NOT INCLUDED in salvage sale.

Insurer reserves the right to reject any and all bids. 

Salvage is as is/where is. 

The posting information is the best to our knowledge. 

An inspection of the salvage is highly recommended. 

WARRANTY:  There is no warranty, express or implied for the information provided herein or the condition, usability, workability, operability or marketability of the aircraft salvage.  All times are approximate and the logbooks and aircraft should be inspected by each bidder BEFORE BIDDING.  Failure of the bidder to view the salvage or wreckage, or confirm any information provided is NOT grounds for a claim or withdrawal of bid after bid closing date.)  

HOURS estimated from logbooks or other information - not guaranteed or warranted.

Read more here:  http://www.avclaims.com

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