What was found
WHILE IN CLIMB, WE HAD THE LT GENERATOR AMBER CAS MESSAGE. RAN CHECKLIST. A FEW MINUTES LATER WE HAD MULTIPLE AMBER CAS MESSAGE, NR 1, 2 AND 3 TUBES WENT BLACK AND NR 4 AND 5 TUBES STARTED FLASHING. LANDED WITH NO FLAPS, NO TRS, SUSPECTING BUSS CONTROLLER FAILURE. R & R LT GENERATOR CONTROL UNIT. OPS CHECK GOOD IAW MM 24-30-00 ALSO R & R LT ACFT BATTERY DUE TO BATTERY DRAIN WITH "GENERATOR OFFLINE" BATTERY OPS CHECK GOOD IAW MM 24-34-00.