As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MHT - FLT 4386 - WHILE EN ROUTE FROM BOS TO SYP, CREW NOTICED SPARKS COMING FROM RT ENGINE INTAKE DUCT HEAT. SYSTEM WAS SHUT DOWN AND AIRCRAFT LANDED AT MHT WITHOUT INCIDENT. MAINTENANCE INSPECTED RT ENGINE INTAKE AND FOUND A HOLE BURNED IN THE LOWER DUCT. DUCT REPLACED AND SYSTEM TESTED GOOD. AIRCRAFT RETURNED TO SERVICE. (X)