• Facebook
  • Twitter
  • LinkedIn
  • Instagram
  • Youtube
Helicopter Flight Training Sponsors
 Search

Categories

 Search

NTSB Final Report: Asotin, Washington

Location:

Asotin, Washington

Accident Number:

WPR19LA249

Date & Time:

August 31, 2019, 22:17 Local

Registration:

N54528

Aircraft:

Hughes 369

Aircraft Damage:

Substantial

Defining Event:

Loss of control in flight

Injuries:

2 None

Flight Conducted Under: Part 91: General aviation - Personal

Analysis

The pilot of the helicopter reported that he was departing over a river in dark night conditions when, shortly after takeoff, the helicopter yawed severely to the left. He applied full right anti-torque pedal and the helicopter subsequently impacted the water. The helicopter was not examined after the accident, and the reason for the loss of control could not be determined based on the available information.

Probable Cause and Findings

The National Transportation Safety Board determines the probable cause(s) of this accident to be: A loss of control for undetermined reasons.

Findings

Not determined                            (general) - Unknown/Not determined

Factual Information

On August 31, 2019, about 2217 Pacific daylight time, a Hughes 369D helicopter, N54528, was substantially damaged when it was involved in an accident near Asotin, Washington. The pilot and passenger were not injured. The helicopter was operated as a Title 14 Code of Federal Regulations Part 91 personal flight.

The pilot reported that he and his passenger departed from a private residence near the Snake River in dark night conditions. The pilot recalled that shortly after lifting off, the helicopter yawed severely to the left. He applied full right anti-torque pedal and the helicopter subsequently impacted the water. He and the passenger egressed the helicopter, which subsequently sank, and were rescued shortly thereafter. The pilot stated that the helicopter had experienced a loss of tail rotor effectiveness, and that the accident was not due to anything he did incorrectly.

The mechanic who was repairing the helicopter after the accident reported that the aft tail rotor aft drive flex coupling had sheared. He stated that none of the four tail rotor blades were damaged during the accident sequence.

No follow-up examination of the helicopter was performed, and the reason for the loss of control could not be determined.

History of Flight

Takeoff                                         Loss of control in flight (Defining event)

Pilot Information

Certificate:

Airline transport; Commercial

Age:

42,Male

Airplane Rating(s):

Single-engine land; Single-engine sea; Multi-engine land

Seat Occupied:

Left

Other Aircraft Rating(s):

Glider; Helicopter

Restraint Used:

4-point

Instrument Rating(s):

Airplane

Second Pilot Present:

No

Instructor Rating(s):

None

Toxicology Performed:

No

Medical Certification:

Class 1 Without waivers/limitations

Last FAA Medical Exam:

September 5, 2017

Occupational Pilot:

Yes

Last Flight Review or Equivalent:

June 12, 2019

Flight Time:

(Estimated) 8000 hours (Total, all aircraft), 3000 hours (Total, this make and model), 4000 hours (Pilot In Command, all aircraft), 15 hours (Last 90 days, all aircraft), 10 hours (Last 30 days, all aircraft), 3 hours (Last 24 hours, all aircraft)

Aircraft and Owner/Operator Information

Aircraft Make:

Hughes

Registration:

N54528

Model/Series:

369 D

Aircraft Category:

Helicopter

Year of Manufacture:

1978

Amateur Built:

 

Airworthiness Certificate:

Normal

Serial Number:

390464D

Landing Gear Type:

High skid

Seats:

5

Date/Type of Last Inspection:

Unknown

Certified Max Gross Wt.:

3000 lbs

Time Since Last Inspection:

 

Engines:

1 Turbo shaft

Airframe Total Time:

 

Engine Manufacturer:

Allison

ELT:

Installed, not activated

Engine Model/Series:

C-20B

Registered Owner:

 

Rated Power:

420 Horsepower

Operator:

On file

Operating Certificate(s) Held:

None

Meteorological Information and Flight Plan

Conditions at Accident Site:

Visual (VMC)

Condition of Light:

Night/dark

Observation Facility, Elevation:

KLWS,1436 ft msl

Distance from Accident Site:

8 Nautical Miles

Observation Time:

Direction from Accident Site:

345°

Lowest Cloud Condition:

Clear

Visibility

 

Lowest Ceiling:

None

Visibility (RVR):

 

Wind Speed/Gusts:

/                                            Turbulence Type

Forecast/Actual:

None / None

Wind Direction:

Turbulence Severity Forecast/Actual:

N/A / N/A

Altimeter Setting:

Temperature/Dew Point:

 

Precipitation and Obscuration:

No Obscuration; No Precipitation

 

Departure Point:

Asotin, WA

Type of Flight Plan Filed:

None

Destination:

Asotin, WA

Type of Clearance:

None

Departure Time:

22:17 Local

Type of Airspace:

Class G

Wreckage and Impact Information

Crew Injuries:

1 None

Aircraft Damage:

Substantial

Passenger Injuries:

1 None

Aircraft Fire:

None

Ground Injuries:

 

Aircraft Explosion:

None

Total Injuries:

2 None

Latitude, Longitude:

46.251667,-116.968612(est)

Administrative Information

Investigator In Charge (IIC):

Vanover, Jackie

 

Additional Participating Persons:

Douglas Belcher; Federal Aviation Administration; Spokane, WA

 

Original Publish Date:

April 1, 2022                                                                    Investigation Class:

3

Note:

The NTSB did not travel to the scene of this accident.

 

Investigation Docket:

https://data.ntsb.gov/Docket?ProjectID=100191