As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 6539 - BOS-EWR - DURING TAXI AT BOS CREW NOTICED INTERIOR AND EXTERIOR EMERGENCY LIGHTS INOP. AIRCRAFT RETURNED TO GATE WITH NO FURTHER PROBLEMS. AIRCRAFT FERRIED TO IAD WHERE MAINTENANCE INSPECTED AND COULD NOT DUPLICATE PROBLEM. OPS CHECK OK. AIRCRAFT WAS RELEASED AND APPROVED FOR RETURN TO SERVICE. (M)