NTSB Identification: LAX89LA040.
The docket is stored on NTSB microfiche number 37883.
Accident occurred Friday, November 04, 1988 in SAN DIEGO, CA
Probable Cause Approval Date: 11/28/1989
Aircraft: MOONEY M20J, registration: N3875H
Injuries: 3 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.

DURING THE INITIAL CLIMB AFTER TAKEOFF, THE ENGINE LOST PARTIAL POWER. A TURN WAS MADE TO LAND ON RWY 10R, BUT THE PILOT WAS UNABLE TO REACH THE LANDING AREA. SUBSEQUENTLY, HE MADE A WHEELS-UP LANDING SHORT OF THE RUNWAY. AN INSPECTIONOF THE ENGINE REVEALED EVIDENCE OF DETONATION OR PREIGNITION IN THE NUMBER FOUR CYLINDER. ANOTHER PILOT, WHO HAD FLOWN THE AIRPLANE ON THE PREVIOUS FLIGHT, SAID THAT WHEN HE WAS RETURNING TO THE AIRPORT FROM A LONG FLIGHT, THE ENGINE BEGAN TO VIBRATE AND THE OIL TEMP AND CYLINDER HEAD TEMP ROSE ABOVE THE RED LINE. AFTER LANDING, HE NOTIFIED THE OPERATOR. THE OPERATOR REPORTED THAT A NEW SET OF SPARK PLUGS WERE INSTALLED AFTER THAT FLIGHT AND THE ENGINE RAN FINE.

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

ENGINE ASSEMBLY,CYLINDER..OVERTEMPERATURE



Contributing Factors

MAINTENANCE..INADEQUATE..OTHER MAINTENANCE PERSONNEL

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