Regional Jet 200 ER/LR (CRJ200)
Flight Crew Air Transport Pilot (ATP)
Situational Awareness; Confusion
Aircraft Equipment Problem Less Severe
Flight Crew Diverted; Flight Crew Landed As Precaution; General Maintenance Action
Aircraft
About 50 NM south of ZZZ we heard a loud bang on the left engine; and lost both Primary Flight Displays; both MFDs; EICAS Display (ED) 1 and the FMS. We made the decision to monitor the situation and continue. As we continued; we heard another bang on the left engine and once again we lost all screens except ED2. Took a look at the fuel and hydraulic synoptic pages and noticed no abnormalities. I also took a look at the electrical synoptic page and noticed an erratic spikes on the left kVA. We decided to look for the next closest field to land; and chose ZZZ as the closest. At this point we were right on top of it. Upon advising ATC; we heard a third bang; and once again lost all screens except ED2. [Center] gave us direct ZZZ but we couldn't insert in FMS; so we asked for vectors and circled down to ZZZ from FL250. Upon decent; our screens came back on momentarily; and just kept going off and on flickering. I disconnected the Autopilot and flew the visual to 17.
The reporter believes that the loud bangs were caused by the left generator drive and were not compressor stalls; although maintenance could not duplicate the anomaly on the ground.
CRJ200 First Officer experienced loud banging noises at FL250; apparently coming from the left engine; and lost both Primary Flight Displays; both MFDs; EICAS Display 1 and the FMS. This event repeated two more times before diverting to an alternate airport.