What was found
A/C 1816 DIVERTED TO ATL BECAUSE OF PASSENGER O2 MASK DEPLOYED. FLIGHT CREW NOTICED A LOUD SCRATCHING NOISE IN THE P/A AND NUMEROUS C/B'S POPPED. T/S FOUND WIRE BUNDLE ARC BURNED OVER LAV L1. ALSO FOUND LA SYS H1 C/B POPPED ON P37 LAV FLUSH SYS N10 P34 AND LAV SHO D4 ON P36 ALSO POPPED. 704304 RE PACKED O2 MASKS ON L/S O A/C 6887480, DISCONNECTED C/P D 3881 D3879 AND D5160 ABOVE LAV. REMOVED HARNESS W0220 FOR REPLACEMENT. 878465 FABRICATED NEW HARNESS W0820 PER WSPM AND WDM. 684597 INSTALLED NEW HARNESS WO820 FROM D5160 TOD3881 AND D3879.