As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
BOS - FLT 6335 - DURING FLIGHT FROM BOS TO YHZ, THE LEFT A/C GEN FAILED AND THE AIRCRAFT RETURNED TO BOS. AIRCRAFT LANDED WITHOUT INCIDENT. BOS MAINTENANCE REPLACED DEFECTIVE LEFT A/C GENERATOR AND GENERATOR CONTROL UNIT. RAN AIRCRAFT AND SYSTEM OPS CHECK NORMAL. AIRCRAFT RETURNED TO SERVICE. (M)