As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PILOT REPORTED ON APPROACH TO LAND, RECIRCULATION FAN NR 2 FAULTED, BEFORE FAULT THERE WAS A UNIQUE SMELL. REMOVED & INSTALLED NR 2 RECIRCULATION FAN IAW 42 AMM JIC 21-22-21 RAI 10000. OPERATIONALLY TESTED GOOD IAW 21-22-21-OPT-00100. NO DISTINCTIVE SMELL NOTED AT THIS TIME.