What was found
(CAN) ON DEPARTURE FROM OTTAWA, CLIMBING THROUGH FL 270 TO 280, A LOUD BANG WAS HEARD AND A SHUDDER CAME FROM NR 1 ENGINE, POWER WAS REDUCED AND ENGINE WAS SHUT DOWN, OTHER THAN FLUCTUATING VIBRATION, OTHER PARAMETERS NORMAL.NUMBER ONE ENGINE REPLACED. MORE INFORMATION WILL FOLLOW WHEN ENGINE REPORT AVAILABLE.