What was found
AFTER TAKEOFF FROM MFM, CLIMBING THROUGH 15,000 FEET A LOUD EXPLOSION WAS HEARD FROM NR 1 ENGINE FOLLOWED BY SEVERE VIBRATION, ENGINE WAS RETARDED TO IDLE POWER, VIBRATION CONTINUED FOLLOWED BY LOW OIL PRESS LIGHT AND EGT INCREASE TO 963 DEGREES C. ENGINE WAS SHUT DOWN AND AIRCRAFT RETURNED TO FIELD AND MADE A SAFE LANDING.