Bell 47G-2 N911X

Summary

On 15 May 1982 at about 20:15 local time, a Bell 47G-2 registered N911X, operated by Island Helicopter, Inc., was involved in an accident near Brookville, New York, 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

15 May 1982 at 20:15

Classification

Accident

Location

Brookville, New York, United States

Coordinates

40.7496, -73.5805

Aircraft

Bell 47G-2

Registration

N911X

Category

Helicopter

Engines

1

Operator

Island Helicopter, Inc.

Operating rule

Part 91: General Aviation

Purpose of flight

Personal

Phase of flight

Not recorded

Route

Garden City → Garden City

Aircraft damage

Substantial

Weather

VMC

Light

Day

NTSB number

NYC82DA097

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

WHILE RETURNING TO THE HELIPORT, THE PILOT NOTICED A DECAY IN THE ENGINE AND ROTOR RPM'S. HE ELECTED TO MAKE A PRECAUTIONARY LANDING IN A PLOWED FIELD. DURING LANDING, THE MANIFOLD PRESSURE WENT TO THE RED LINE WHILE THE RPM DECAYED. THE HELICOPTER TOUCHED DOWN SOFTLY, BUT WITH ABOUT 10 MPH FORWARD SPEED. IT ROLLED FORWARD AND TO THE RIGHT WHEN THE SKIDS DUG INTO THE SOFT GROUND. AN INVESTIGATION REVEALED THAT THE NO. 6 CYLINDER HAD A LOW COMPRESSION READINGOF 5/80 WITH BLOW-BY EVIDENT INTO THE INTAKE SYSTEM. WHEN THE CYLINDER WAS REMOVED, THE INTAKE VALVE WAS FOUND NOT TO BE SEATING PROPERLY. NO OTHER MALFUNCTION OR DEFECT OF THE ENGINE OR ENGINE CONTROLS WAS NOTED.

Quoted verbatim from the NTSB record.