As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LGW - FLT 15 EN ROUTE FROM MUC TO PHL, CREW REPORTED A SMELL OF SMOKE IN THE COCKPIT AND CABIN AS WELL AS A FLICKERING IN THE OVERHEAD LIGHTING. FLIGHT DIVERTED TO LGW AND LANDED WITHOUT FURTHER INCIDENT. NO EMERGENCY WAS DECLARED. MAINTENANCE REPLACED THE RIGHT RECIRCULATION FAN.