NTSB Identification: LAX00LA055.
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Accident occurred Thursday, October 07, 1999 in APACHE JUNCTION, AZ
Probable Cause Approval Date: 05/16/2001
Aircraft: Bell 206B, registration: N6624N
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.
While in cruise flight about 600 feet agl, the pilot noticed that the engine oil pressure was high and the torque gauge was exceeding the high limits. The engine chip light became illuminated. As the pilot descended to make an immediate landing, the engine quit about 75 to 100 feet agl. The pilot autorotated to the ground. The main rotor blades severed the tail cone aft of the horizontal stabilizer after the toe of the left skid became entangled in a large bush and separated. A teardown examination of the engine was conducted. The mechanic reported that the Nos. 6 and 7 bearings displayed evidence of heat distress and oil starvation. When he blew through the oil jet for the Nos. 6 and 7 bearings, he heard something pop out. He opined that it might have been a piece of carbon, which could have prevented the flow of oil into the turbine. He stated that all other components of the lubrication system were intact and functional. No other discrepancies were found.
The National Transportation Safety Board determines the probable cause(s) of this accident to be: Oil starvation and seizure of the engines Nos. 6 and 7 bearings due to a clogged oil jet, which resulted in a total loss of engine power. Full narrative available
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