As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AT ARRIVAL TO GATE, REPORT OF STRONG CHEMICAL BURNING ODOR. MAINTENANCE CONFIRMED ELECTRICAL ODOR IN FORWARD HALF OF CABIN. R & R RELAYS R2-528 AND R2-529 DUE TO SIGNS OF HEAT DAMAGE. CONTINUED TROUBLESHOOTING ODOR TO ROWS 20-22 CDE. FOUND POTABLE WATER AUXILIARY PUMP WITH BURNED ODOR. R & R AUXILIARY PUMP IAW MM. OPS CHECKS OK.