What was found
FLT 466 RSW-BOS. LEVEL 2 MAGIC MARKER ODOR NOTICEABLE ONCE LEVEL AT FL340, ODOR NOTICEABLE IN CABIN FROM ROWS 11 TO FORWARD CABIN. RAN ISOLATION CHECKLIST AND SHUT PACK 1 OFF WITH CROSS BLEED. ODOR STILL NOTICEABLE.;ACCOMPLISHED INFO NOTICE 2017-T015M AND PERFORMED TSM 05-50-00-810-831-A. ISOLATED ODOR TO TYPE 5 PACK 1 WITH APU BLEED. BOTH PACK 1 AND APU BLEED PLACED ON MEL REF L/P 4474811 ITEM 1 AND 2 FOR MEL CORRECTIVE ACTION.