What was found
FLIGHT ATTENDANT HEADSETS 'EMER PILOT' RED LIGHT ILUMINATING INTERMITTENTLY AND ALSO DIMLY - BOTH FORWARD AND AFT HANDSETS. REMOVED FROM SERVICE. DURING T/S REMOVED AFT CEILING PANEL, NOTED PLUG POS 40 WARM. REMOVED CANNON PLUG NOTED SOCKETS T & S EVIDENCE OF ARCING, BROKE WIRE TO SOCKET S WHILE TRYING TO REMOVE REMOVED AND REPLACED P0540 CANNON PLUG IAW E175 AMM SP 20-21-10/SP 20-21-20. FLASHLIGHT FWD CHARGE C/B REMAINED IN. C/W OPS CHECK OF PACIS EMERGENCY AND NORMAL MODE IAW E175 AMM 44-11-710-802A AND 44-11-00-710-801A. OPS CHECK GOOD WITH NO DEFECTS NOTED. AIRCRAFT RETURNED TO SERVICE.