As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DRAIN AT L1 DOOR BLOCKED UP WASTE WATER FOUND ON DRIP PAN OVER EICAS COMPUTERS. ON INSPECTION, FOUND EXCESSIVE WASTE WATER ABOVE EICAS COMPUTER DRIP TRAY. TRACED BLOCKAGE TO DRAIN LINE ADJACENT TO FWD DRAIN MAST. REMOVED DEBRIS INCLUDING BOTTLE TOPS ETC. FLUSHED LINE, RETURNED A/C TO NML. OK FOR SVC.