As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SHIP 1815 FLOOR AND CEILING EMERGENCY LIGHTS FLASHING ON AND OFF REPEATERLY FROM LEFT SIDE OF AIRCRAFT FROM DOOR 3L TO BACK OF AIRCRAFT , CORRECITIVE ACTION: OP CHECKED UNABLE TO FAULT OPS NML A/C CONTINUE TO SERVICE B767 -400 AMM 33-50 (8246434)