NTSB Identification: CEN11FA267
14 CFR Part 91: General Aviation
Accident occurred Monday, April 04, 2011 in South Bend, IN
Probable Cause Approval Date: 11/05/2012
Aircraft: CIRRUS DESIGN CORP SR-22, registration: N847C
Injuries: 1 Fatal.
NTSB investigators either traveled in support of this investigation or conducted a significant amount of investigative work without any travel, and used data obtained from various sources to prepare this aircraft accident report.
The pilot was performing a landing approach with a known, gusting crosswind present. A witness stated that the airplane was being “bounced around” by the wind gusts and that it “stalled and rolled to the left.” Another witness heard the accident airplane go to full power. The airplane was then in a 15- to 30-degree left bank with a nose-down attitude before it impacted the ground. The airplane’s left wing impacted the ground first, then the airplane cartwheeled one-half turn. A postaccident examination of the airplane revealed no preimpact airframe or engine anomalies that would have precluded normal operation of the airplane.
About 8 months before the accident, the airplane's annual inspection was completed, and 2 days later the airplane's recoverable data module (RDM) stopped recording data due to a failed transient voltage suppressor (TVS) and did not record data during the accident flight. The airplane underwent a 100-hour inspection about midway through the 8 month period, and the failed RDM was not detected at that time. The system does not provide a failure indication to the pilot, and there is no requirement during the 100-hour inspection to check the RDM. A likely cause of the TVS failure could have been electrical overstress: the airplane was tied down overnight, and lightning was present when the RDM stopped recording. A similar airplane sustained substantial lightning strike airframe and avionics damage while tied down and at least two other airplanes sustained lightning strikes at that time. An Air Force Research Lab report recommended that a “review of the system design be conducted to determine if a cockpit indicator could be installed to alert the pilot when data logging is not functioning."
The National Transportation Safety Board determines the probable cause(s) of this accident to be: The pilot’s failure to maintain airplane control while on final approach with a gusting crosswind and the subsequent aerodynamic stall and spin during the attempted go-around. Full narrative available
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