Sunday, March 17, 2019

Robinson R44 Raven II, N7535S: Accident occurred December 18, 2018 in Strykersville, Wyoming County, New York

Additional Participating Entity:
Federal Aviation Administration / Flight Standards District Office; Rochester, New York

Aviation Accident Final Report - National Transportation Safety Board:

Investigation Docket - National Transportation Safety Board:

Location: Strykersville, NY
Accident Number: GAA19CA103
Date & Time: 12/18/2018, 1530 EST
Registration: N7535S
Aircraft: Robinson R44
Aircraft Damage: Substantial
Defining Event: Miscellaneous/other
Injuries: 2 None
Flight Conducted Under: Part 91: General Aviation - Personal 


The pilot reported that, during landing on a home-built landing platform, the helicopter landed normally and was stable. He reduced engine power and began to wait the prescribed engine cool-down period before shutdown. About 1 minute before the engine completely shut down, the platform collapsed, and the helicopter rolled aft and to the right and then came to rest on its right side.

Postaccident examination of the platform revealed that it had a structural failure and had collapsed.

The helicopter sustained substantial damage to the tailboom.

The pilot 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 structural failure of the home-built landing platform during landing, which resulted in the helicopter rolling over.


Environmental issues
Ground support/equipment - Effect on operation (Cause)

Factual Information

History of Flight

After landing
Miscellaneous/other (Defining event)
Roll over

Pilot Information

Certificate: Flight Instructor; Commercial
Age: 61, Male
Airplane Rating(s): None
Seat Occupied: Unknown
Other Aircraft Rating(s): Helicopter
Restraint Used: 3-point
Instrument Rating(s): None
Second Pilot Present: No
Instructor Rating(s): Helicopter
Toxicology Performed: No
Medical Certification: Class 2 With Waivers/Limitations
Last FAA Medical Exam: 05/17/2018
Occupational Pilot: Yes
Last Flight Review or Equivalent: 10/25/2018
Flight Time:  (Estimated) 3000 hours (Total, all aircraft), 2300 hours (Total, this make and model), 2920 hours (Pilot In Command, all aircraft), 56 hours (Last 90 days, all aircraft), 28 hours (Last 30 days, all aircraft)

Aircraft and Owner/Operator Information

Aircraft Make: Robinson
Registration: N7535S
Model/Series: R44 II
Aircraft Category: Helicopter
Year of Manufacture: 2004
Amateur Built: No
Airworthiness Certificate: Normal
Serial Number: 10496
Landing Gear Type: Skid;
Seats: 4
Date/Type of Last Inspection: 05/06/2018, 100 Hour
Certified Max Gross Wt.: 2500 lbs
Time Since Last Inspection:
Engines: 1 Reciprocating
Airframe Total Time: 1824.4 Hours at time of accident
Engine Manufacturer: Lycoming
ELT: C126 installed, not activated
Engine Model/Series: IO-540-AE1A5
Registered Owner: Moog Inc.
Rated Power: 205 hp
Operator: Moog Inc.
Operating Certificate(s) Held: None 

Meteorological Information and Flight Plan

Conditions at Accident Site: Visual Conditions
Condition of Light: Day
Observation Facility, Elevation: KBUF, 705 ft msl
Distance from Accident Site: 16 Nautical Miles
Observation Time: 2054 UTC
Direction from Accident Site: 311°
Lowest Cloud Condition: Few / 2900 ft agl
Visibility:  10 Miles
Lowest Ceiling:
Visibility (RVR):
Wind Speed/Gusts: 9 knots /
Turbulence Type Forecast/Actual: None / None
Wind Direction: 260°
Turbulence Severity Forecast/Actual: N/A / N/A
Altimeter Setting: 30.19 inches Hg
Temperature/Dew Point: -2°C / -8°C
Precipitation and Obscuration: No Obscuration; No Precipitation
Departure Point: Strykersville, NY
Type of Flight Plan Filed: None
Destination: Strykersville, NY
Type of Clearance: None
Departure Time: 1515 EST
Type of Airspace: Class G

Airport Information

Airport: KING AIRFIELD Private (PVT)
Runway Surface Type: Metal/Wood
Airport Elevation: 1440 ft
Runway Surface Condition: Dry
Runway Used: N/A
IFR Approach: None
Runway Length/Width:
VFR Approach/Landing: None

Wreckage and Impact Information

Crew Injuries: 1 None
Aircraft Damage: Substantial
Passenger Injuries: 1 None
Aircraft Fire: None
Ground Injuries: N/A
Aircraft Explosion: None
Total Injuries: 2 None
Latitude, Longitude: 42.768889, -78.461111 (est)

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