B737-800
Flight Crew Air Transport Pilot (ATP); Flight Crew Instrument; Flight Crew Multiengine
Human-Machine Interface; Time Pressure; Troubleshooting; Workload
Aircraft Equipment Problem Critical; Deviation / Discrepancy - Procedural MEL / CDL; Deviation / Discrepancy - Procedural Published Material / Policy; Deviation / Discrepancy - Procedural Maintenance
Air Traffic Control Provided Assistance; Flight Crew Overcame Equipment Problem; Flight Crew Requested ATC Assistance / Clarification; General Flight Cancelled / Delayed; General Maintenance Action
Aircraft
Beginning descent into ZZZ; a cascading electrical failure occurred causing multiple light to illuminate and several system to fail; including iff; trim; left aft fuel pump; equipment cooling supply; pack controller left; multiple window heat over heats; etc...noted TR2 was zero amps.  Ran QRH checklists...until 8;000 feet MSL when landing became primary task. Requested priority handling and landed uneventfully. Airport Support personnel assisted; no external hot-spots found.  Taxied to gate. Coordinated with local Maintenance Control.A cascading electrical failure occurred on descent into ZZZ.  It is unknown how to prevent electrical failures.  Recommend development of QRH multiple electric failure check list...executing all individual light procedures is time consuming and diverts attention from large situation.
Air Carrier First Officer reported multiple EICAS messages displayed and several electronic system failures during descent. Flight crew completed part of the QRH checklist. Flight crew requested priority handling and executed a safe landing.