As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ACRID SMELL WHEN LH & RH RECIRC FANS ARE ON SMELL DISSIPATES WHEN TURNED OFF<[01] PERFORMED CONDITON INSP IAW AMM 05-51-56 NO DEFECTS NOTED ON RECIR FAN SYSTEM OK TO PER MEL 21-25-01A SP1;[02] REMOVED AND REPLACED LH AND RH RECIRC FAN PER AMM 21-25-02. REMOVED AND REPLACED THE LH AND RH RECIRC AIR FILTER PER AMM 21-25-01. OPS CHECK GOOD NO SMELLS AT THIS TIME