As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) HELI SKIING: HELICOPTER WAS UP IN AN ALPINE LANDING PAD. THE PASSENGERS HAVE BEEN ON LOADED FROM THEHELICOPTER. THE HELICOPTER SKIING GUIDE ON THE RIGHT SIDE OF THE HELICOPTER GAVE THE SIGNAL TO TAKE OFF. THE HELICOPTER TOOK OFF AND DESCENDED DOWN THE HILL. ENROUTE DESCENT A LOUD NOISE OCCURRED AND THE LOSS OF THE POP OUT WINDOW OCCURRED. THE PILOT LANDED AT THE HANGAR.