As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ONE FAN BLADE WAS FRACTURED APPROX .5 INCHES ABOVE THE ROOT PLATFORM. THE FRACTURE SURFACE SHOWED FATIGUE INITIATING AT A NICK ON THE CONVAVE AIRFOIL SIDE OF THE BLADE. THE FATIGUE PROPAGATED 2.3 INCHES REARWARD BEFORE TERMINATING IN RAPID TENSILE OVERLOAD RESULTING IN THE LIBERATION OF THE BLADE. THE LIBERATED FAN BLADE CAUSED EXTENSIVE DAMAGE TO THE LOW AND HIGH PRESSURE COMPRESSORS. (M)