As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
KLAX - LOG PAGE: F27562 - DURING CRUISE FLIGHT, A STRONG ELECTRICAL ODOR WAS NOTICED BY THE CREW EMANATING FROM THE COCKPIT. THE ODOR CAME ON INTERMITTENTLY. UNABLE TO DETERMINE THE SOURCE OR ORIGIN BY ISOLATING OR TURNING OFF CERTAIN COMPONENTS. INSPECTED BEHIND ALL CIRCUIT BREAKER PANELS. FOUND HF NR 2 AC C/B DISCOLORED AND CHARRED. REPLACED C/B. OPERATIONAL CHECKS GOOD, ALL OTHER AREAS CHECKED OK. (X)