As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(AUS) ENGINE TO TRANSMISSION DRIVE SHAFT FAILED AND SEPARATED AT THE TRANSMISSION END. SUSPECT ATTACHMENT NUTS PN MS21043-4 HAD NOT BEEN CORRECTLY RETORQUED (LEFT FINGER TIGHT) FOLLOWING SERVICING AND GREASING OF THE SHAFT APPROXIMATELY ONE HOUR PREVIOUSLY. TWO OF THE NUTS WERE FOUND ON THE TRANSMISSION DECK. (X)