As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
OCASSIONAL VIBRATION AND LIGHT BURNING SMELL IN CRUISE FL 340 COMPLIED WITH COM PROCEDURES ( EXTRACT FAN VENT AVNCS SYS FAULT NOT DISPLAYED )-R/R AVIONICS EXTRACT FAN IAW AMM 21-26-51 OPS CHECK GOOD. THIS CLOSES DMI #2947444-1 PLACARD REMOVED MOC NOTIFIED