What was found
ROTTEN EGG SMELL REPORTED AFT CABIN BY THE FAS ISOLATED PACK 2 ODOR WENT AWAY FOR ABOUT 40 MINS. THE SMELL CAME BACK, PROCEDING TO ISOLATE PACK 1, SMELL DISSIPATED FOR A FEW MINS. EVENTUALLY ODOR CAME BACK SO WE PERFORMED THE AIR PACK 1+2 PROCEDURE AND DESCENDED TO FL 100. ROTTEN EGGS SMELL. APPARENT SOURCE: UNKNOWN. AFT CABIN. NO VISIBLE SMOKE/HAZE. NO MEDICAL ATTENTION REQUIRED.-REF TSM 05-50-00-810-831-A INSPECTED ENGINE AND APU OIL LEVEL IAW AMM 12-13-79 AMD 125-13-49, ALL LEVLES GOOD. INSPECTED APU COMPRESSOR INLET FOR CONTAMINATION, NONE FOUND. OPS TEST PACK 1= 2 WITH APU IAW AMM 36-12-00. NO ODOR FOUND. OPS TEST PACKS 1+2 WITH ENG 1+ 2 IAW AMM 36-11-00. ENG 2 BLEED PRODUCED BURING SMELL