What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
(-23) PIC performed pre-flight and then completed two air tours to the grand canyon. Upon landing from the second and final flight, the a/c was shutdown and a post flight walk around was performed. The post flight revealed that the tail rotor had received damage which pierced the t/r blades skin completely through the blade. Upon further investigaiton, the PIC and maintenance personnel found that an air guide condensor fin had broken away from the right side of the fuselage air conditioning inlet port. The fin, the "l" bracket, or a combination of both may have struck the tail rotor blade.
As the FAA filed it
(-23) PIC PERFORMED PRE-FLIGHT AND THEN COMPLETED TWO AIR TOURS TO THE GRAND CANYON. UPON LANDING FROM THE SECOND AND FINAL FLIGHT, THE A/C WAS SHUTDOWN AND A POST FLIGHT WALK AROUND WAS PERFORMED. THE POST FLIGHT REVEALED THAT THE TAIL ROTOR HAD RECEIVED DAMAGE WHICH PIERCED THE T/R BLADES SKIN COMPLETELY THROUGH THE BLADE. UPON FURTHER INVESTIGAITON, THE PIC AND MAINTENANCE PERSONNEL FOUND THAT AN AIR GUIDE CONDENSOR FIN HAD BROKEN AWAY FROM THE RIGHT SIDE OF THE FUSELAGE AIR CONDITIONING INLET PORT. THE FIN, THE "L" BRACKET, OR A COMBINATION OF BOTH MAY HAVE STRUCK THE TAIL ROTOR BLADE.