As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT NR 4035 - AIRCRAFT RETURNED TO GATE AFTER CREW REPORTED SMOKE AND ELECTRICAL BURNING SMELL IN COCKPIT. MAINTENANCE INSPECTED AIRCRAFT AND DISCOVERED CHAFFED WIRES FLIGHT OFFICER HSI. REPAIRED DAMAGED WIRES IAW STANDARD MAINTENANCE PRACTICES. AIRCRAFT RETURNED TO SERVICE.