What was found
BURNING RUBBER ODOR ON APPROACH AND DURING TAXI. SUSPECT ENVIRO SYSTEM. OPERATIONALLY CHECKED ECS AND BLEED AIR SYS AND COULD NOT NOTICE UNUSUAL ODORS. CHECKED MAINTENANCE DIAGNOSTIC SCREEN AND FOUND NO ABNORMALITIES. DOWNLOADED CMC FILES AND SENT FOR ANALYSIS WITH NO DEFECTS NOTED. PERFORMED FIM TASK 21-20-20-00-810-801-A WITH NO DEFECTS NOTED. CONTACT CENTER RECOMMENDED RELEASE AND MONITOR. ADVISED MCC THAT AN OCF MAY BE NECESSARY. NO FURTHER ACTION NECESSARY.