As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
N2 FAILURE OCCURRED. UPON ENGINE DISASSEMBLY AND INSP, FAILURE WAS CAUSED BY LOCK PIN AN 122683 HOLDING BEARING SLEEVE IN GEAR 1-070-062-04 FALLING OUT ALLOWING GEAR POSITION TO CHANGE AND SUBSEQUENT N2 DRIVE TO FAIL. GEAR IS COMPONENT OF CARRIER ASSY 1-070-220-13.