What was found
FLT#267, BOS-CHS. 'LEVEL 2 ODOR EVENT ON DESCENT FROM 14,000 UNTIL LEVEL OFF AT 11,000 HEAVY DISTINCT ODOR OF VINEGAR AND MUSTY SOCKS; PER FIM 21-22-00-04 PERFORMED MULTIPLE ENG RUNS WITH NO ODOR NOTED. GVI OF ENGINES OK WITH NO SIGNS OF OIL LEAK. EACH ENGINE RUNNING PACK 1,2 OR BOTH, NO ODOR. APU BLEED, NO ODOR REF LP 4107857-A FOR GMM DEFERAL TO MONITOR.'