As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) ROTORCRAFT WAS RETURNING TO BASE WHEN SOUND WAS HEARD OF BLADE TAPE COMING OFF A BLADE. NO FURTHER SOUNDS OR PROBLEMS OCCURRED. UPON ARRIVAL AT BASE, IT WAS DISCOVERED THAT THE BOTTOM SIDE OF A MAIN ROTOR BLADE POCKET HAD DEPARTED THE ROTORCRAFT.