What was found
(CAN) A/C DEPARTED. DURING CLIMB OUT THROUGH FL250, FLT CREW HEARD ABNORMAL SOUND FROM REAR OF A/C. ALL ENGINE PARAMETERS WERE NORMAL EXCEPT FOR RISE IN EGT. FLT CREW REQUESTED TO RETURN. APPROXIMATELY 30 NAUTICAL MILES FROM LANDING, ENGINE BEGAN TO MAKE ABNORMAL SOUNDS, SECURED ENGINE. A/C LANDED SUCCESSFULLY. CONTRACTED AMO AND ADVISED OF CONDITION OF ENGINE AS DAMAGE TO REAR FAN AREA & EXCESSIVE OIL LEAK. BY REMOVING ENGINE TAIL CONE, IT HAS BEEN OBSERVED THAT AFT OIL PRESSURE LINE TO AFT FAN BEARING NR 5 FOUND CRACKED. ALTHOUGH SERVICE DIFFICULTY REPORT IDENTIFIES CRACKED TUBE ASSY P/N 5002T27P01, WE SHOULD NOT DISREGARD POSSIBILITY OF BEARING FAILURE.