As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
BURNING WIRE ODOR IN COCKPIT AT SAME TIME THE PASSENGER NOTED A POP IN AUDIO HEADSET AND ALL AUDIO WENT OUT IN CABIN HEADSET. INSPECTED WIRE IN COCKPIT PANNEL P1. FOUND WIRE INTACT, NO SIGN OF BURNING. RESET IFE SYS VIDEO AND AUDIO, OPS NORMAL. NO POPPING SOUNDS OR ODORS.