What was found
CREW REPORTED- CLIMBING THROUGH 19,000 FEET, WE HAD A BLACKOUT. PFD 1, MFD 1, EICAS, RMU 1 & 2, AND FMS 1 & 2 CAME BACK AFTER 3 SECONDS. PFD 2 AND MFD 2 TOOK ABOUT 20-25 SECONDS TO COME BACK. WE HAD TONS OF EICAS MESSAGES THAT POPPED UP WITH 3 BEING RED. ON THE EICAS, WE DIDN’T HAVE ANY INDICATIONS FOR ENGINE 2 AS WELL AS FUEL QUANTITY WAS DASHED OUT. PITCH TRIM WAS DASHED OUT. I COULD NOT TALK TO THE FO FOR ABOUT 20 SECONDS AND HE COULDN’T HEAR ANYONE ELSE. THINGS STARTED TO COME BACK SLOWLY. THE ONLY THING THAT DIDN’T COME BACK WAS THE ISIS. CORR ACTION- MX TROUBLESHOT AND FOUND LOOSE MOUNTING HARDWARE ON ELECTRONIC BUS CONTACTOR (EBC) # 2. REINSTALLED AND OPERATIONALLY CHECKED SYSTEM. OPS CHECK IS GOOD. NTSB REPORT FILED BY JSX'S DIRECTOR OF SAFETY.