As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ETOPS - DURING CRUISE FLT410 HYDRAULIC NOMINAL FILLING RANGE INDICATION MOVING UP AND DOWN. ALSO CHANGING BETWEEN GREEN AND WHITE. POST FLT REPORT SHOWS HSMU 1JG FAULT ON PIN 4. REMOVED + REPLACED HSMU 1JG IAW A330 AMM 29-11-34. OPS CHECK GOOD.