What was found
FLIGHT ATTENDANTS REPORTED A BAD ODOR DURING DESCENT. HEAVY FUMES AFFECTING PAX AND CREW. TROUBLESHOT IAW FIM 71-05-00-815-828-R00. BORESCOPED THE NR 1 ENGINE, FOUND NO EVIDENCE OF OIL. RAN THE NR 1 & 2 ENGINES AT DIFFERENT POWER SETTINGS WITH BLEEDS OF EACH ENGINE PROVIDING BLEED TO EACH PACK ONE AT A TIME. VERIFIED LEFT BLEED HAD NO ODOR. BUT RIGHT BLEED HAD A DIRTY SOCK ODOR WITH EITHER LEFT OR RIGHT PACKS RUNNING. ACCOMPLISHED BOROSCOPE INSPECTION OF NR 1 AND 2 ENGINE COMPRESSOR SECTIONS, NO EVIDENCE OF OIL FOUND. IAW FIM 71-05-00-815-828-R00.