As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ACRID ODOR IN THE COCKPIT AND CABIN. RAN QRH AND ODOR DISSIPATED. FOUND LEFT RECIRCULATION FAN CIRCUIT BREAKER OPEN, VERIFIED LEFT RECIRCULATION FAN SMELLED BURNED. ACTIVATED ALL DEPOWERED SYSTEMS EXCEPT LEFT RECIRCULATION FAN AND THE ODOR DID NOT RETURN. RAN BOTH PACKS AND ALL GALLEY SYSTEMS, NO ODOR. REPLACED RT RECIRCULATION FAN. OPS CHECKED GOOD PER MM.