Helicopter Flight Training Sponsors
 Search

Subscribe

Categories

 Search

NTSB Final Report: Denton, TX

 

 

Location:

Denton, TX

Accident Number:

GAA19CA250

Date & Time:

05/06/2019, 1020 CDT

Registration:

N5990

Aircraft:

BELL 47G

Aircraft Damage:

Substantial

Defining Event:

 

Injuries:

2 None

Flight Conducted Under:

Part 91: General Aviation - Instructional

Analysis 

The student pilot reported that he hovered the helicopter to the parking pad and landed with the helicopter's nose facing north. The skid placement on the parking pad was incorrect, and the flight instructor directed the student to reposition the helicopter about 3 ft to the left. The student brought the helicopter to a hover and repositioned it 3 ft to the left.

However, before the student established a descent and landed, the helicopter encountered a tailwind gust. The nose pitched down, the rotor rpm decreased, and the helicopter traveled about 75 ft forward. The skids contacted the ground hard, and the helicopter came to an abrupt stop, upright and facing downslope. The main rotor blades struck the tail rotor drive shaft and the tailboom. The tail rotor gear box and the tail rotor separated from the helicopter.

The helicopter sustained substantial damage to the tail rotor drive system, the tailboom, and the main rotor blades.

The pilot reported that there were no mechanical malfunctions or failures with the helicopter that would have precluded normal operation.

The airport's METAR reported that, about the time of the accident, the wind was from 180° at 15 knots and that the cloud layer was broken at 800 ft.

Probable Cause and Findings
The National Transportation Safety Board determines the probable cause(s) of this accident to be:

The flight instructor's improper decision to instruct the student pilot to establish a hover and reposition the helicopter with a tailwind, which resulted in the student pilot's loss of pitch control. 

Findings

Aircraft

Pitch control - Not attained/maintained (Cause)

Personnel issues

Decision making/judgment - Instructor/check pilot (Cause)

Aircraft control - Student pilot (Cause)

Environmental issues

Tailwind - Decision related to condition (Cause)

Tailwind - Effect on operation (Cause)

Factual Information

History of Flight

Maneuvering-hover

Other weather encounter

Loss of control in flight

Landing

Hard landing

Collision with terr/obj (non-CFIT)

Part(s) separation from AC

 

 

Pilot Information

Certificate:

Student

Age:

54, Male

Airplane Rating(s):

None

Seat Occupied:

Left

Other Aircraft Rating(s):

None

Restraint Used:

 

Instrument Rating(s):

None

Second Pilot Present:

Yes

Instructor Rating(s):

None

Toxicology Performed:

No

Medical Certification:

Class 3 Without Waivers/Limitations

Last FAA Medical Exam:

11/15/2018

Occupational Pilot:

No

Last Flight Review or Equivalent:

 

Flight Time:

(Estimated) 24 hours (Total, all aircraft), 15 hours (Total, this make and model), 24 hours (Pilot In Command, all aircraft), 15 hours (Last 90 days, all aircraft), 5 hours (Last 30 days, all aircraft), 1 hours (Last 24 hours, all aircraft)

 

 

Flight Instructor Information

Certificate:

Airline Transport; Flight Instructor; Flight Engineer

Age:

61, Male

Airplane Rating(s):

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

Seat Occupied:

Right

Other Aircraft Rating(s):

Helicopter

Restraint Used:

 

Instrument Rating(s):

Airplane; Helicopter

Second Pilot Present:

Yes

Instructor Rating(s):

Airplane Multi-engine; Airplane Single-engine; Helicopter; Instrument Airplane; Instrument Helicopter

Toxicology Performed:

No

Medical Certification:

Class 1 With Waivers/Limitations

Last FAA Medical Exam:

01/30/2019

Occupational Pilot:

Yes

Last Flight Review or Equivalent:

02/07/2019

Flight Time:

(Estimated) 30000 hours (Total, all aircraft), 200 hours (Total, this make and model), 25000 hours (Pilot In Command, all aircraft), 100 hours (Last 90 days, all aircraft), 50 hours (Last 30 days, all aircraft), 10 hours (Last 24 hours, all aircraft)

 

 

Aircraft and Owner/Operator Information

Aircraft Make:

BELL

Registration:

N5990

Model/Series:

47G 2

Aircraft Category:

Helicopter

Year of Manufacture:

1992

Amateur Built:

No

Airworthiness Certificate:

Normal

Serial Number:

2396

Landing Gear Type:

Skid

Seats:

3

Date/Type of Last Inspection:

06/07/2018, Annual

Certified Max Gross Wt.:

2450 lbs

Time Since Last Inspection:

 

Engines:

1 Reciprocating

Airframe Total Time:

3360.1 Hours at time of accident

Engine Manufacturer:

Lycoming

ELT:

Not installed

Engine Model/Series:

VO-435-A1

Registered Owner:

On file

Rated Power:

270 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:

KDTO, 642 ft msl

Distance from Accident Site:

0 Nautical Miles

Observation Time:

1528 UTC

Direction from Accident Site:

348°

Lowest Cloud Condition:

 

Visibility

10 Miles

Lowest Ceiling:

Broken / 8000 ft agl

Visibility (RVR):

 

Wind Speed/Gusts:

15 knots /

Turbulence Type Forecast/Actual:

/

Wind Direction:

180°

Turbulence Severity Forecast/Actual:

/

Altimeter Setting:

29.96 inches Hg

Temperature/Dew Point:

25°C / 17°C

Precipitation and Obscuration:

No Obscuration; No Precipitation

Departure Point:

DENTON, TX (DTO)

Type of Flight Plan Filed:

None

Destination:

DENTON, TX (DTO)

Type of Clearance:

VFR

Departure Time:

0900 CDT

Type of Airspace:

Class D

 

Airport Information

Airport:

Denton Enterprise (DTO)

Runway Surface Type:

Asphalt

Airport Elevation:

642 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:

2 None

Aircraft Damage:

Substantial

Passenger Injuries:

N/A

Aircraft Fire:

None

Ground Injuries:

N/A

Aircraft Explosion:

None

Total Injuries:

2 None

Latitude, Longitude:

33.202222, -97.198056 (est)


Administrative Information

Investigator In Charge (IIC):

Michael A Hicks

Report Date:

03/03/2020

Additional Participating Persons:

Johnny Perez; FAA; Irving, TX

Publish Date:

03/03/2020

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=99392





Read More
Created 29 days ago
by jhadmin

Tags Denton NTSB Report TX
Categories Press Releases
Categories
Print

Related Articles