http://www.ntsb.gov/_layouts/ntsb.av...15FA121&akey=1

"The NTSB determined the probable cause(s) of this accident to be a total loss of engine power during initial climb when the carburetor main metering jet became unseated, which led to an extremely rich fuel-to-air ratio. Contributing to the accident was the lack of adequate carburetor maintenance instructions. Contributing to the severity of the pilot's injuries was the improperly installed shoulder harness."

Interesting that the typical: "The pilots failure to . . . ." is missing as a probable cause.

Finally a NTSB report that supports the notion that sometimes S%&t happens and there is nothing you can do about it.