NTSB Identification: SEA02LA117.
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Accident occurred Monday, July 01, 2002 in Battle Ground, WA
Probable Cause Approval Date: 04/08/2003
Aircraft: Cessna 172 E, registration: N37065
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.

According to the pilot, the aircraft lost oil pressure shortly after takeoff. During the landing attempt at a nearby airport, the aircraft overran the end of the runway and collided with a tree. A post-accident engine run and wreckage examination revealed that the aircraft's engine developed an extensive engine oil leak during the accident flight, and during a post-accident engine run. According to the FAA Inspector, and the operator of the aircraft, the leak originated from the engine accessory area where the oil temperature bulb attaches to the oil screen assembly. The operator reported that the oil temperature bulb appeared to have been improperly installed during an oil change that occurred approximately 15 minutes prior to the accident flight. The pilot of the accident aircraft, a certified mechanic, supervised the oil change that was performed by a non-certified mechanic who was employed by the pilot.

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

Improper maintenance procedures by maintenance personnel, which resulted in an engine oil leak while in flight. A factor was the pilot's misjudgment of distance during the precautionary landing which led to a runway overrun.

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