As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING FLIGHT FA ADVISED BURNING ODOR IN CABIN AND FLICKERING LIGHTS OVERHEAD. NO SMOKE. REF FIM 21-00 TASK 806. COULD NOT DUPLICATE SMELL. FOUND HYD B SYSTEM AT 103%. DRAINED HYD B SYSTEM TO 92% REF AMM 29-00-00. NO DEFECTS FOUND TO CABIN LIGHTS. DETERMINED TO BE AN INTERMITTENT FAULT. OKAY FOR SERVICE. (DECLARED EMERGENCY)