Bell 47J N2837B

Summary

On 27 July 1984 at about 15:30 local time, a Bell 47J registered N2837B was involved in an accident near Grove, Oklahoma, United States. 3 people were on board and one had minor injuries. The aircraft was destroyed. No probable cause statement is available for this record.

Date

27 July 1984 at 15:30

Classification

Accident

Location

Grove, Oklahoma, United States

Coordinates

36.5897, -94.7795

Aircraft

Bell 47J

Registration

N2837B

Category

Helicopter

Engines

1

Operator

Not recorded

Operating rule

Part 91: General Aviation

Purpose of flight

Personal

Phase of flight

Not recorded

Route

Grove → Unknown

Aircraft damage

Destroyed

Weather

VMC

Light

Day

NTSB number

FTW84LA325

1 person had minor injuries.

The NTSB has not published a probable cause for this record. No probable cause statement is present in the source data.

Nothing about the cause is stated here that is not in the source record.

Read the full NTSB narrative

THE PLT STATED THAT YAW CONTROL WAS LOST DURING CLIMB OUT FOR A LOCAL FLT WITH TWO PASSENGERS ONBOARD. THE ACFT BEGAN TOROTATE TO THE RIGHT AND THE ANTITORQUE PEDALS WERE INEFFECTIVE. THEY WERE OVER BUILDINGS AT THE TIME SO THE PLT HELD A MINIMUM DESCENT UNTIL CLEAR OF THE BUILDINGS. THE ACFT CONTINUED TO ROTATE UNTIL GROUND IMPACT. THE ACFT ROLLED OVER ON ITS RIGHT SIDE AND CAUGHT FIRE. INSPECTION OF THE ACFT REVEALED THAT BOTH PINS IN THE TAIL ROTOR DRIVE U-JOINT HAS SHEARED DUE TO UNSUFFICIENT TORQUE ON THE ACORN NUTS.

Quoted verbatim from the NTSB record.