fdr
Thankfully uncontained failures are rare, If it does occur however despite designing to keep critical systems and components outside the burst zone the final outcome is heavily dependant on chance. This is far beyond any certification case and a disc failure can break the engine in 2 which is likely to result in detachment of the fan cowl doors and possibly the reverser C ducts. The front and rear of the engine could still be attached to the airframe but significant damage to the pylon could have occurred. An instantaneous loss of thrust coupled with a drag increase as the nacelle breaks up is possible. Occurring at high rating on climb out would be very hazardous.