As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
INBOARD LEADING EDGE DRIVE SHAFT/TORQUE TUBE SHEARED. DRIVE SHAFT SHOWED SIGNS OF SEVERE CHAFING DAMAGE DUE TO WATER SUPPLY LINE AND ADJACENT CLAMP. TORQUE TUBE HAD BEEN WORN THROUGH BY MORE THAN 50 PERCENT OF THICKNESS PRIOR TO FAILURE DURING MAINTENANCE.