What was found
AIRCRAFT WAS GROUNDED: ON CLIMB EICAS MESSAGE HYDRAULIC PRESSURE C1. FAILED 15 MINS PRIOR TO L1 FAILURE. EMERGENCY DECLARED; FLIGHT RETURNED TO ORD LANDING SAFELY. MAINTENANCE RAN LEFT ENGINE AND WAS UNABLE TO GET L1 VARIABLE FREQUENCY STARTER GENERATOR (VFSG ) TO COME ONLINE. MAINTENANCE FOUND POWER FEEDER CABLE TERMINAL LEAD BROKEN AND BURNT AT TERMINAL BLOCK TS16111. REPLACED TERMINAL BLOCK (AALA202306267582) AND TERMINAL LUG (AALA202306260998) PER SWPM 20-30-14. ACCOMPLISHED SATISFACTORY OPERATIONAL TEST OF L1 VFSG PER AMM 24-21-00.