What was found
AIRCRAFT WAS GROUNDED. DURING CRUISE THE LEFT GENERATOR OFF AND LEFT CSD PRESSURE LOW LIGHT ILLUMINATED ACCOMPANIED BY THE ATTENDANTS REPORTING A FAINT BURNING ELECTRICAL SMELL. FOUND LEFT CSD OIL QUANTITY OVER FULL WITH METAL CONTAMINATION AND THE SCAVENGE FILTER DIFFERENTIAL PRESSURE INDICATOR POPPED. 06/14/16 - REMOVED AND REPLACED LEFT ENGINE GENERATOR (AALA20160610004) AND CONSTANT SPEED DRIVE IAW AMM 24-10-01. LEAK AND OPERATIONAL CHECK GOOD.