As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE EMERGENCY LIGHTS OVER 1L AND 1R DOORS CAME ON IN FLIGHT AND WERE FLICKERING AT A FAST FREQUENCY. CEILING LIGHT OUTSIDE FIRST CLASS LAV ALSO FLICKERED ALONG WITH THE EMERGENCY DOOR LIGHTS. MAINTENANCE REPLACED THE EMERGENCY LIGHTS BATTERY PACK B5-259 PER B717 AMM 33-51. (LP #7071564)