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NTSB Report
December 18, 2018 · Robinson R44 II · N7535S
Strykersville, NY
Overview
Report Status
Final with probable cause
Event Type
Accident
Date
December 18, 2018
Injury Outcomes
No injuries (2 uninjured)
Location
Strykersville, NY
Aircraft
Robinson R44 II (2004)
Tail Number
N7535S
Operator
Moog
Injuries
None
Aircraft Damage
Substantial
NTSB Number
GAA19CA103
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.
NTSB Probable Cause
The structural failure of the home-built landing platform during landing, which resulted in the helicopter rolling over.
Full Narrative
The pilot reported that, during landing on a home-built landing platform (dolly), the helicopter landed normally and was stable. He reduced engine power and began to wait the prescribed engine cool down period before shutdown. About "60 seconds prior to complete shutdown", the platform (dolly) collapsed, and the helicopter rolled aft and to the right. The helicopter came to rest on its right side. Postaccident examination of the platform revealed that the home-built landing platform had a structural failure and 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.
Flight
Event TypeAccident
Event Time15:30 EST
Nearest AirportKing Airfield Private (0nm)
Flight Plan FiledNone
Flight Plan ActivatedNo
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftRobinson R44 II
Tail NumberN7535S
Aircraft CategoryHeli
DamageSubstantial
OperatorMoog
Operating RulePart 91
Engines1
Engine TypeReciprocating
Engine DetailsLycoming · IO-540-AE1A5 · Reciprocating · 205
Seats4
People & Injuries
Injury SummaryNo injuries (2 uninjured)
Fatal0
Serious0
Minor0
Uninjured2
Total2
Crew 1Age 61 · Second Class · None
Conditions
ConditionsVMC
LightDaylight
Wind260° @ 9 kt
Visibility10 sm
CeilingNone
Temperature / Dew Point28 C / 18 C
Altimeter30.19 inHg
Observation Time20:54
Weather SourceWFAC