What was found
(CAN) ON DESCENT THE AIRCRAFT SUSTAINED A LIGHTNING STRIKE. BOTH DC GENERATORS TRIPPED BUT WERE ABLE TO RESET. THIS WAS FOLLOWED BY A LOSS OF THE DC BUS AND THE FO`S INSTRUMENTS. AFTER SHUTTING OFF THE MAIN BATTERY AND #2 DC GEN AS PER THE QRH THEY REGAINED ALL INSTRUMENTS AND LANDED WITHOUT INCIDENT. THE AIRCRAFT IS CURRENTLY UNDER MAINTENANCE AND TROUBLESHOOTING HAS REVEALED THE GENERATOR CONTROL UNIT IS FAULTY AND HAS BEEN REPLACED. THERE IS ALSO LIGHTING STRIKE DAMAGE TO THE R/H AILERON TRAILING TIP AND A REPAIR REQUEST HAS BEEN SENT TO BOMBARDIER. A/C HOURS: 64006 A/C CYCLES: 66118 PART NAME: (GCU) GENERATOR CONTROL UNIT P/N: 51539-008C S/N : 4831 (TC# 20190516006)