What was found
CREW REPORTS ACRID ODOR IN AIRCRAFT. CREW DEBRIEFED & REPORTED THEY HEARD RUMBLING NOISE AT FL 200, FOLLOWED BY ACRID BURNT RUBBER ODOR THROUGHOUT AIRCRAFT. CREW REPORTED NO SMOKE PRESENT, NO ECAM FAULTS DISPLAYED & PACK OPERATIONS GOOD THROUGHOUT FLIGHT. INSPECTED AIRCRAFT FOUND AVIONICS COMPARTMENT BLOWER FAN AT FAULT, R & R. OPERATIONS & LEAK CHECKED GOOD, NO OTHER FAULTS NOTED AT THIS TIME.