Aerospatiale AS 315B N3835W

Summary

On 27 April 1984 at about 12:15 local time, a Aerospatiale AS 315B registered N3835W was involved in an accident near Hartshorn, Oklahoma, United States. One person was on board and nobody was injured. The aircraft was substantially damaged. No probable cause statement is available for this record.

Date

27 April 1984 at 12:15

Classification

Accident

Location

Hartshorn, Oklahoma, United States

Coordinates

34.8306, -95.5495

Aircraft

Aerospatiale AS 315B

Registration

N3835W

Category

Helicopter

Engines

1

Operator

Not recorded

Operating rule

Part 91: General Aviation

Purpose of flight

Positioning

Phase of flight

Not recorded

Route

McAlester → Unknown

Aircraft damage

Substantial

Weather

VMC

Light

Day

NTSB number

FTW84LA213

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

THE HELICOPTER SUSTAINED SUBSTANTIAL DAMAGE DURING AN AUTOROTATIVE LANDING FOLLOWING AN EXPLOSION IN THE ENGINE COMPARTMENT. WHILE IN LEVEL FLIGHT AT 1000 FT AGL, THE PLT HEARD A LOUD SCREECH FROM THE ENGINE AREA FOLLOWED BY A LOUD BANG. A WINGMAN OBSERVED 10 FT FLAMES FROM THE ENGINE EXHAUST. A HARD AUTOROTATIVE LANDING RESULTED WHEN THE PLT ATTEMPTED TO STRETCH THE GLIDE TO A MORE SUITABLE LANDING AREA. THE PLT THEN EXTINGUISHED THE FIRE USING AN ONBOARD EXTINGUISHER. METALLURGICAL EXAM OF THE AXIAL COMPRESSOR SECTION TRACED THE COMPRESSOR BLADE FAILURE TO AN IMPROPER RETAINING PIN WHICH CAUSED A STRESS CONCENTRATION IN THE COMPRESSOR BLADE ROOT. IT WAS DETERMINED THAT THE PIN WAS INSTALLED DURING THE ORIGINAL MANUFACTURING PROCESS.

Quoted verbatim from the NTSB record.