As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON ENTERING THE COCKPIT, SMELLED A BURNED ELECTRONIC LIKE ODOR. PERFORMED FIM 21-21-00-810-806. FOUND RTU NR 2 INTERNAL FAN INOPERATIVE MESSAGE ON THE MDC. VERIFIED SOURCE OF THE ODOR TO BE THE RTU . R & R RTU 2 IAW AMM 23-81-01. OPS CHECKED GOOD.