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NTSB Report
June 1, 2010 · Hughes 269A · N8897F
Cannon Falls, MN
Overview
Report Status
Final with probable cause
Event Type
Accident
Date
June 1, 2010
Injury Outcomes
No injuries (1 uninjured)
Location
Cannon Falls, MN
Aircraft
Hughes 269A
Tail Number
N8897F
Injuries
None
Aircraft Damage
Substantial
NTSB Number
CEN10CA280
The pilot reported that shortly after liftoff he noticed a “disturbing vibration” in the helicopter. He elected to initiate an autorotation to an open agricultural field. The pilot stated that he executed a 180-degree turn in order to avoid a tree line. He noted that the rotor speed got too low and he was unable to reduce the sink rate, which resulted in a hard landing. The main rotor contacted and separated the tail boom and the right landing skid collapsed during the accident sequence. The pilot noted that additional practice in autorotation descents and landings might have prevented the accident.
NTSB Probable Cause
The pilot's failure to maintain rotor speed during the autorotation, which resulted in an excessive sink rate and a hard landing.
Full Narrative
The pilot reported that shortly after liftoff he noticed a “disturbing vibration” in the helicopter. He initiated an autorotation to an open agricultural field. The pilot stated that he executed a 180-degree turn in order to avoid a tree line. He noted that the rotor speed got too low and he was unable to reduce the sink rate, which resulted in a hard landing. The main rotor contacted and separated the tail boom, and the right landing skid collapsed during the accident sequence. The pilot noted that additional practice in autorotation descents and landings might have prevented the accident.
Flight
Event TypeAccident
Event Time19:15 CDT
Nearest Airport0nm
Flight Plan FiledNone
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftHughes 269A
Tail NumberN8897F
Aircraft CategoryHeli
DamageSubstantial
Operating RulePart 91
Engines1
Engine TypeReciprocating
Engine DetailsLycoming · HO-360 · Reciprocating · 180
Seats2
People & Injuries
Injury SummaryNo injuries (1 uninjured)
Fatal0
Serious0
Minor0
Uninjured1
Total1
Crew 1Age 70 · Third Class · None
Conditions
ConditionsVMC
LightDaylight
Wind220° @ 3 kt
Visibility10 sm
CeilingNone
Temperature / Dew Point41 C
Altimeter29.88 inHg
Observation Time23:53
Weather SourceWFAC