As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RUN ENG 1 & ENG 2 TO TROUBLE SHOOT SMELLY SOCK ODOR IN COCKPIT. GROUNDED - YES. PERFORMED ENG 1 & ENG 2 RUN IAW A330 AMM 71-00-00. ISOLATED ENG 1, ENG 2 & APU BLEEDS AND FOUND STRONGEST ODOR HAPPENS WITH ENG 1 RUNNING AND APU BLEED ON. FURTHER TROUBLESHOOTING REQUIRED.