As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTS LOSS OF LEFT GENERATOR. [SUP 05-04-07] REPLACED LEFT ENGINE INTEGRATED DRIVE GENERATOR. RAN UP ENG PER JRH 2-6-1, IDG OPERATED NORMALLY. OUTBOUND TRIP DID VERIFICATION TEST AND IDG OPERATED OK. SUSPECT INTERNAL WEAR LED TO FAULTY HERTZ OUTPUT & MISMATCH WITH OTHER A/C GENERATOR.