As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CRANKSHAFT FRACTURED IN AFT CHEEK OF NR 2 THROW CAUSING ENGINE TO STOP. THE CRANKSHAFT WAS IN THE 0.010 INCH UNDER CONDITION. THE ORIGIN OF THE FRACTURE MAY HAVE BEEN THE AFT RADIUS OF THE NR 2 CRANK PIN. THE CRANKSHAFT WAS MAGNAFLUXED AT OVERHAUL. SUBMITTER RECOMMENDS MAKING ULTRASONIC INSPECTION AN OVERHAUL REQUIREMENT ON AGING ENGINES.