As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE EMERGENCY LIGHTS INTERMITTENTLY CAME ON & OFF DURING FLIGHT. WATER WAS FOUND IN THE EXIT SIGN AT THE TAILCONE. REPLACED IAW WDM 33-51. THE EMERGENCY LIGHTS NOW OPERATE NORMALLY. ALSO REMOVED CONDENSATION ABOVE AFT DROP CEILING PANEL.