As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) PILOT REPORTED HEARING A LOUD BANG AND THOUGHT PIECES OF THE HELICOPTER FELL FROM THE BELLY. PILOT WAS FLYING VERTICAL REFERENCE WITH A BAMBI BUCKET. UPON IMMEDIATE RETURN TO THE PAD, THE HELL HOLE SIDE INSPECTION PANELS WERE REMOVED AND THE SUPPORT CASE WAS FOUND BROKEN AT LIFT LINK FITTING. THE TRANSMISSION ASSEMBLY WAS REPLACED. A/C RETURNED TO SERVICE.