As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) DURING GROUND RUN FOR MAINTENANCE ACTIVITY STROBING OF TAIL ROTOR ASSEMBLY AN EXPLOSING AND SUBSEQUENT FIRE OCCURRED IN THE FUEL CELL ASSEMBLY AND AFT PASSENGER COMPARTMEN. AIRCRAFT WAS ON ITS FOURTH START OF THE DAY FOR TAIL ROTOR BALANCING CHECK, FIRE EXTINGUISHED. AIRCRAFT SUFFERED SERIOUS STRUCTUREAL DAMAGE. MINOR GROUND MAINTENANCE PERSONNEL INJURY.