As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
A CRACK SEVERAL INCHES LONG WAS FOUND IN THE STATOR HOUSING. IT HAD BEEN STOP-DRILLED AND FILLED WITH SOME TYPE OF SEALANT. IT WAS NOT INITIALLY APPARENT DUE TO SEVERAL LAYERS OF PAINT OVER THE HOUSING. THE STATOR HOUSING SHOULD HAVE BEEN REPLACED AT SOME EARLIER REPAIR OR O/H. NOT AN ACCEPTABLE REPAIR. THE CAUSE OF THE CRACK IS UNKNOWN. REF: WO R13-04147.