NTSB Identification: CEN11CA103
14 CFR Part 91: General Aviation
Accident occurred Thursday, November 18, 2010 in Spring, TX
Probable Cause Approval Date: 05/16/2011
Aircraft: PIPER PA-28RT-201T, registration: N8320H
Injuries: 2 Uninjured.

NTSB investigators used data provided by various entities, including, but not limited to, the Federal Aviation Administration and/or the operator and did not travel in support of this investigation to prepare this aircraft accident report.

Shortly after departure the airplane experienced an electrical failure. The pilot elected to return to his departure airport for landing. He performed an emergency landing gear extension; however, with no electrical power remaining, he could not verify that the landing gear was down and locked via the gear position lights. Seconds after the airplane touched down on the runway, the right landing gear collapsed. The pilot was unable to maintain directional control and the airplane departed the right side of the runway and impacted a runway light, coming to rest in an upright and right-wing-low position adjacent to the runway. The airplane’s right wing spar and right aileron were substantially damaged during the accident. An examination of the right landing gear revealed that the downlock mechanism had not fully engaged, thus resulting in its collapse. The electrical failure was due to an inoperative alternator.

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

The failure of the right landing gear down-lock mechanism to fully engage. Contributing to the accident was the pilot’s inability to verify the landing gear extension due to the inoperative alternator.

Full narrative available

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