CHECKS WERE MADE ON THE 88BT, MOTOR ROTATION OKAY. GE FRAME 9E UNIT WAS STARTED, UP, SPEED RAMED TILL FULL SPEED NO LOAD, NO ISSUE. BUT DURING SYNCHRONIZATION, UNIT ENTERED FIRED SHUTDOWN AND THE GENERATOR BREAKER TRIPPED WITH THE FOLLOWING STANDING ALARMS; TURB COMPT COOLING FAN CHANGE OVER AND LOSS OF TURBINE COMPT COOLING FAN. PLEASE ANY SUGGESTIONS AS TO WHAT COULD BE THE ISSUE?