What was found
FA REPORTED BURNING RUBBER SMELL FROM AFT GALLEY ON DECENT INTO LAS. DESCRIPTION OF ODOR/FUMES: PERSISTENT, BURNING RUBBER SMELL. APPARENT CABIN SOURCE: UNKNOWN. AFT CABIN/GALLEY(LAV). NO VISIBLE SMOKE/HAZE. NO MEDICAL ATTENTION REQUIRED. PERFORMED ENGINE IDLE RUN IAW AMM 71-00-00 ON ENGINE #1 AND ENGINE #2 TO CONFIRM FAULT/FUME. NO FUMES NO FAULTS FOUND. DURING INVESTIGATION FOUND GALLEY EXTRACTION FAN MAKING EXCESSIVE NOISE INTO AFT GALLEY. REMOVED GALLEY EXTRACTION FAN IAW AMM 21-23-51. OBSERVED SLIGHT ODOR COMING FROM FAN. INSTALLED NEW FAN IAW AMM 21-23-51. OPS CHECK GOOD. NO ODORS PRESENT.