Narrative:

Landed on sand bar. Subsequent takeoff -- inadequate takeoff distance. Wheels contacted the water; resulting in the aircraft nosing over into 6 inches of water. No injuries.

Google
 

Original NASA ASRS Text

Title: A J3 Pilot reported insufficient takeoff distance available during a sandbar takeoff; and the aircraft nosed over in the river.

Narrative: Landed on sand bar. Subsequent takeoff -- inadequate takeoff distance. Wheels contacted the water; resulting in the aircraft nosing over into 6 inches of water. No injuries.

Data retrieved from NASA's ASRS site as of April 2012 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.