THE ACFT COLLIDED WITH A DIRT BANK AFTER A LEFT ENGINE OVERSPEED AND LOSS OF DIRECTIONAL CONTROL DURING TAKEOFF. THE PLTHAD ALREADY ABORTED ONE TAKEOFF DUE TO OVERBOOST AND A STICKING WASTEGATE. THE PROBLEM SEEMED CORRECTED AFTER WORK AND LUBRICATION BY A MECHANIC AND WORKED SATISFACTORILY FOR ABOUT A MONTH. THEN DURING THIS TKOF THE OVERBOOST WAS ENOUGH TOCAUSE THE PLT TO LOSE DIRECTIONAL CONTROL AND DEPART THE RWY. THE PLT WAS TRYING TO 'SAVE THE TAKEOFF' BY RETURNING TO THE RWY WHEN THE ACFT WING STRUCK A DIRT PILE. POST ACCIDENT INVESTIGATION SHOWED THAT A STICKING VALVE IN THE TURBOCHARGER WASTEGATE OF THE LEFT ENGINE AND A STUCK PRESSURE RELIEF VALVE CAUSED THE OVERBOOST CONDITION.

The National Transportation Safety Board determines the probable cause(s) of this accident to be:

The National Transportation Safety Board determines the probable cause(s) of this accident to be:

The National Transportation Safety Board determines the probable cause(s) of this accident to be:

The National Transportation Safety Board determines the probable cause(s) of this accident to be:

The National Transportation Safety Board determines the probable cause(s) of this accident to be:

Contributing Factors

EXHAUST SYSTEM,TURBOCHARGER..OVERSPEED

Contributing Factors

TERRAIN CONDITION..DIRT BANK/RISING EMBANKMENT

Contributing Factors

OPERATION WITH KNOWN DEFICIENCIES IN EQUIPMENT..ATTEMPTED..PILOT IN COMMAND

Index for Oct1983 | Index of months