Grumman G-164A N4866

Summary

On 25 July 1983 at about 13:30 local time, a Grumman G-164A registered N4866 was involved in an accident near Chilton, Texas, 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

25 July 1983 at 13:30

Classification

Accident

Location

Chilton, Texas, United States

Coordinates

31.3003, -97.0599

Aircraft

Grumman G-164A

Registration

N4866

Category

Airplane

Engines

1

Operator

Not recorded

Operating rule

Part 137: Agricultural

Purpose of flight

Aerial Application

Phase of flight

Not recorded

Route

Marlin → Unknown

Aircraft damage

Substantial

Weather

VMC

Light

Day

NTSB number

FTW83LA351

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

DURING THE 1ST SWATH RUN THE PROP SEPARATED FROM THE ENG. A FORCED LANDING WAS MADE IN A PLOWED FIELD SHEARING ONE MAIN LANDING GEAR. THE ACFT THEN WENT THROUGH A BARBED WIRE FENCE. THE #4 CYLINDER WAS REMOVED TO INSPECT THE VIBRATION DAMPER PINS IN ACCORDANCE WITH AD 82-23-04. THE TRAILING PIN ON THE REAR VIBRATION DAMPER EVIDENCED CONSIDERABLE WEAR. THE WEAR HAD PROGRESSED TO THE POINT THAT THE DAMPER HAD BEEN DISPLACED FROM ITS NORMAL POSITION TO A POINT CAUSING INTERFERENCE WITH THE SKIRTS OF THE #2 & #3 PISTONS. THIS WEAR, IN ADDITION WITH MINOR WEAR TO THE LEADING PIN, CAUSED VIBRATION & SUBSEQUENT PROP SEPARATION. TWO DAYS AFTER THE ACCIDENT, AD 83-15-06 WAS ISSUED GROUNDING ALL ACFT WITH THE PROP-ENG COMBINATION THAT WAS INSTALLED ON THIS ACFT.

Quoted verbatim from the NTSB record.