What was found
AIRCRAFT WAS GROUNDED: AT CRUISE FL390 AIRFLOW SURGED HIGH AND LOW FOLLOWED BY FLICKERING OF ALL PILOT DISPLAYS AND PANEL LIGHTS AND ELEC TRU FAULT MESSAGE. DECESION MADE TO RETURN TO MIA AND AIRCRAVT LANDED OVERWEIGHT AND EMERGENCY WAS DECLARED. AIRCRAFT LANDED WIHTOUT INCIDENT. MAINTENANCE FOUND P500 CONNECTOR DP500P01 LOOSE (SDR AALA202603017419), LEFT ENGINE VFSG T1 FEEDER LOOSE (SDR AALA20260302337) AND LEFT ENGINE VFSG T2 FEEDER LOOSE (SDR AALA202603025315) SECURED ALL AND PERFORMED OPS CHECKS AMM REF 24-22-04, 24-22-05, 24-09-04, AMM 32-42-00, 24-36-02.