What was found
SHIP 3250 DISC: DURING BOARDING A STRONG CIGARETTE/ RUBBER SMELL PREVALENT IN THE FIGHT DECK AND COMFORT PLUS. SMELL BECAME STRONGER WITH CABIN FANS ON IN BOTH PLACES AND DISSIPATED WHEN SELECTED OFF. SMELL OCCURRED WITH APU ON AND OFF. C/A: CONFIRMED SMELL OCCURRED WITH CABIN FANS SELECTED ON. FOUND LT RECIRC FAN AND DUCT WITH ODOR SIMILAR TO WHAT WAS SMELLED IN COCKPIT AND CABIN. ISOLATED RT RECIRC AND OPS CHECKED WITH NO SMELL FROM RT FAN. IDENTIFIED LT RECIRC FAN AS SOURCE OF ODOR. REPLACED BOTH RECIRC FILTERS PER A320 AMM 21-21 (WIP) 441219 REMOVED AND REPLACED LEFT CABIN RECIRCULATION FAN IN REFERENCE TO A320 AMM 21-21. OPS CHECK AND LEAK CHECK GOOD AT THIS TIME. NO MORE SMELL WITH BOTH APU ON AND OFF. NO GO ODI PREVENTION COMPLIED WITH. (LP: 5980716)