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NTSB Final Report: Groveland, FL

 

Location:

Groveland, FL

Accident Number:

GAA20CA062

Date & Time:

11/07/2019, 1105 EST

Registration:

N6746D

Aircraft:

Bell 47G

Aircraft Damage:

Substantial

Defining Event:

Hard landing

Injuries:

1 None

Flight Conducted Under:

Part 91: General Aviation - Personal


Analysis

The student pilot reported that, during landing, the helicopter experienced a hydraulic failure. He added that he "overreacted" by making multiple commands to the cyclic, which resulted in a tail strike, followed by a hard landing and roll-over. The helicopter caught fire, and the student egressed through the left door. The helicopter sustained substantial damage to the fuselage and tailboom. According to Federal Aviation Administration inspectors who interviewed the pilot immediately following the accident, the pilot stated that he overreacted and that he did not accomplish the helicopter manufacturer's Hydraulic Failure emergency procedure because he "didn't want to let go of the cyclic or the collective to turn off the hydraulic pressure switch." The hydraulic pump and the hydraulic lines were damaged during the postaccident fire; therefore, the reason for the reported hydraulic failure could not be determined.

Probable Cause and Findings

The National Transportation Safety Board determines the probable cause(s) of this accident to be: The student pilot's improper cyclic input after a reported hydraulic failure, the reason for which could not be determined, and his failure to follow the emergency procedures, which resulted in a hard landing.


Findings

Aircraft

Flight control system - Incorrect use/operation (Cause)

Personnel issues

Use of equip/system - Student pilot (Cause)

Use of policy/procedure - Student pilot (Cause)

Not determined

Not determined - Unknown/Not determined (Cause)

Factual Information

History of Flight

Landing

Hard landing (Defining event)

 

Pilot Information

Certificate:

Commercial

Age:

72, Male

Airplane Rating(s):

Multi-engine Land; Multi-engine Sea; Single-engine Land; Single-engine Sea

Seat Occupied:

Left

Other Aircraft Rating(s):

Glider

Restraint Used:

 

Instrument Rating(s):

Airplane

Second Pilot Present:

No

Instructor Rating(s):

None

Toxicology Performed:

No

Medical Certification:

BasicMed With Waivers/Limitations

Last FAA Medical Exam:

06/10/2019

Occupational Pilot:

No

Last Flight Review or Equivalent:

10/10/2019

Flight Time:

(Estimated) 19000 hours (Total, all aircraft), 20 hours (Total, this make and model), 18925 hours (Pilot In Command, all aircraft), 25 hours (Last 90 days, all aircraft)


 

Aircraft and Owner/Operator Information

Aircraft Make:

Bell

Registration:

N6746D

Model/Series:

47G 2

Aircraft Category:

Helicopter

Year of Manufacture:

1958

Amateur Built:

No

Airworthiness Certificate:

Normal

Serial Number:

2250

Landing Gear Type:

Skid

Seats:

3

Date/Type of Last Inspection:

04/01/2019, Annual

Certified Max Gross Wt.:

2450 lbs

Time Since Last Inspection:

 

Engines:

1 Reciprocating

Airframe Total Time:

 

Engine Manufacturer:

Lycoming

ELT:

Installed, activated, did not aid in locating accident

Engine Model/Series:

VO435

Registered Owner:

On file

Rated Power:

194 hp

Operator:

On file

Operating Certificate(s) Held:

None

 

Meteorological Information and Flight Plan

Conditions at Accident Site:

Visual Conditions

Condition of Light:

Day

Observation Facility, Elevation:

KZPH, 90 ft msl

Distance from Accident Site:

20 Nautical Miles

Observation Time:

1535 UTC

Direction from Accident Site:

238°

Lowest Cloud Condition:

Clear

Visibility

10 Miles

Lowest Ceiling:

None

Visibility (RVR):

 

Wind Speed/Gusts:

7 knots /

Turbulence Type Forecast/Actual:

/

Wind Direction:

40°

Turbulence Severity Forecast/Actual:

/

Altimeter Setting:

30.17 inches Hg

Temperature/Dew Point:

28°C / 23°C

Precipitation and Obscuration:

No Obscuration; No Precipitation

Departure Point:

Groveland, FL (6FL0)

Type of Flight Plan Filed:

None

Destination:

Groveland, FL (6FL0)

Type of Clearance:

None

Departure Time:

1000 EST

Type of Airspace:

Class G

 

Airport Information

Airport:

Seminole Lake (6FL0)

Runway Surface Type:

Unknown

Airport Elevation:

120 ft

Runway Surface Condition:

Dry

Runway Used:

18

IFR Approach:

None

Runway Length/Width:

3000 ft / 200 ft

VFR Approach/Landing:

Full Stop

 

Wreckage and Impact Information

Crew Injuries:

1 None

Aircraft Damage:

Substantial

Passenger Injuries:

N/A

Aircraft Fire:

On-Ground

Ground Injuries:

N/A

Aircraft Explosion:

None

Total Injuries:

1 None

Latitude, Longitude:

28.405833, -81.837778 (est)

 

Administrative Information

Investigator In Charge (IIC):

Michael A Hicks

Report Date:

06/16/2020

Additional Participating Persons:

James Boles; FAA; Orlando, FL

Publish Date:

06/16/2020

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=100543





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