NTSB Identification: LAX00LA112.
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Accident occurred Wednesday, March 01, 2000 in COALINGA, CA
Probable Cause Approval Date: 06/25/2003
Aircraft: Piper PA-32R-301T, registration: N8170S
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 landing gear collapsed during a precautionary landing following a complete electrical system failure. The airplane experienced a complete electrical failure during cruise. The pilot decided to make a precautionary landing and diverted to an alternate airport. He shut down all electrical items when he became aware of the electrical system failure. As he neared the alternate airport, he slowed the airplane down to the normal gear extension speed, lowered the gear with the automatic switch, and felt the landing gear extend. He stated that because there were no landing gear lights illuminated he could not verify that the landing gear was in the locked position. He then conducted the emergency gear extension checklist, and noted that his airspeed and power were consistent with what he associated with the landing gear being in the down position. Touchdown was normal, but on the landing rollout, the nose and left main landing gear collapsed and the left wing struck a taxi light. Prior to exiting the airplane, the pilot shutoff the master switch. During the recovery of the airplane, it was raised on jacks and the landing gear was extended with no discrepancies noted. During repair work on the airplane, a landing gear extension/retraction test was conducted, with no system anomalies noted. The inspection of the airplane was unable to determine the cause of the electrical failure.

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

The failure of the landing gear for undetermined reasons to go into the locked position after the pilot conducted a manual and emergency gear extension. A factor in the accident was the undetermined failure of the electrical system.

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