As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FUMES IN COCKPIT ON CLIMB OUT. RETURN TO FIELD. ODOR PERSISTS. OPERATED LEFT & RIGHT PACK ON BOTH APU & RT ENG BLEED. VERIFIED SOURCE OF SMELL TO BE COMING FROM LEFT PACK. NO SMELL DURING RIGHT PACK OPS ON EITHER RT ENG OR APU BLEED SOURCE. ALL ENG RUNS & BLEED OPS PERFORMED AS PER A220 AMP 36-11. (JR621876) REF . LOG PG 8148355 FOR SIGN OFF. (LP# 8148353)