Bell 47G N6330D

Summary

On 23 February 1987 at about 19:45 local time, a Bell 47G registered N6330D, operated by Allied Helicopter Services, Inc, was involved in an accident near Sand Springs, Oklahoma, United States. 2 people were on board and nobody was injured. The aircraft was substantially damaged. No probable cause statement is available for this record.

Date

23 February 1987 at 19:45

Classification

Accident

Location

Sand Springs, Oklahoma, United States

Coordinates

36.1301, -96.1303

Aircraft

Bell 47G

Registration

N6330D

Category

Helicopter

Engines

1

Operator

Allied Helicopter Services, Inc

Operating rule

Part 91: General Aviation

Purpose of flight

Instructional

Phase of flight

Not recorded

Route

Tulsa → Unknown

Aircraft damage

Substantial

Weather

VMC

Light

Day

NTSB number

FTW87LA069

Nobody was injured.

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

INSTRUCTOR PLT WAS DEMONSTRATING A CONFINED AREA TAKEOFF TO THE PVT PLT TAKING ADVANCE INSTRUCTION. AS THE ACFT CLEARED THE BARRIERS, THE QUARTERING HEAD WIND SHIFTED TO A TAIL WIND AND THE ACFT LOST TRANSLATIONAL LIFT. APPLICATION OF FULL POWER DID NOT REMEDY THE SITUATION AND THE ACFT LOST ROTOR RPM. ACFT SETTLED INTO THE TREES BEFORE THE INSTRUCTOR COULD REESTABLISH A CLIMB. A TAIL WIND WOULD SUBSTANTIALLY INCREASE THE POWER REQUIREMENT FOR THE MANEUVER THAT WAS BEING ATTEMPTED.

Quoted verbatim from the NTSB record.