NTSB Identification: ATL88LA217.
The docket is stored on NTSB microfiche number 37777.
Accident occurred Thursday, July 21, 1988 in LAWRENCEVILLE, GA
Probable Cause Approval Date: 12/03/1989
Aircraft: MOONEY M20E, registration: N6810V
Injuries: 1 Uninjured.

NTSB investigators may not have traveled in support of this investigation and used data provided by various sources to prepare this aircraft accident report.

THE PLT REPORTED THAT THE ENGINE FAILED SHORTLY AFTER TAKEOFF. THE PILOT MADE A 180 DEGREE TURN AND LANDED DOWNWIND ON THE RUNWAY. HE ELECTED TO LAND GEAR UP TO AVOID A DROP-OFF PAST THE RUNWAY END. THE ACFT SLID OFF THE RUNWAY END, BUT CAME TO A STOP BEFORE REACHING THE DROP-OFF. EXAM OF THE ENGINE REVEALED THAT THE #4 ROD BEARING HAD FAILED DUE TO LACK OF LUBRICATION, ALTHOUGH THERE WAS OIL IN THE CRANKCASE. THE PILOT STATED THAT THE ENGINE HAD EXPERIENCED AN INFLIGHT LOSS OF OIL PRESSURE 2 DAYS BEFORE,AND HE MADE A PRECAUTIONARY LANDING. THE MECHANIC WHO SUBSEQUENTLY EXAMINED THE ENGINE FOUND AN IMPROPERLY SECURED FITTING ON THE PROP GOV OIL LINE. HE ALSO FOUND 1 QUART OF OIL REMAINING. THE MECHANIC SECURED THE FITTING, CHECKED THE OIL FILTER AND SCREEN FOR METAL, THEN SERVICED THE ENGINE WITH OIL. THE ENGINE WAS TEST RUN SEVERAL TIMES THEN RELEASED TO THE OWNER. THE ENGINE MANUFACTURER STATES IN THE ENGINE SPECS THAT THE MINIMUM SAFE OIL QUANTITY IN THE ENGINE IS 2 QUARTS.

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

PROCEDURES/DIRECTIVES..NOT UNDERSTOOD..OTHER MAINTENANCE PERSONNEL

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

MAINTENANCE..INADEQUATE..OTHER MAINTENANCE PERSONNEL

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

ENGINE ASSEMBLY,CONNECTING ROD..FAILURE,TOTAL




Contributing Factors

MAINTENANCE..IMPROPER..UNKNOWN


Contributing Factors

FLUID,OIL..STARVATION


Contributing Factors

ENGINE ASSEMBLY,BEARING..PREVIOUS DAMAGE

Index for Jul1988 | Index of months