As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PILOT REPORT : 13.MAY.2021=> WO 15989225 ) DURING T/O HYD B RSVR LO LVL WAS PRESENT ON ECAM RTO WAS PERFORMED AT 80 KTS. CORRECTION ACTION: 14.MAY.2021=> IN ACCORDANCE WITH AMM 29-12-41-000/400-003-A, THE LOW LEVEL SWITCH OF THE BLUE HYDRAULIC SYSTEM WAS REMOVED AND REPLACED. OPERATIONAL TEST SATISFACTORY IAW AMM 29-31-00-710-001 AMM REV 56. IAW TSM 29-12-00-810-803-A LOSS OF THE CORRECT QUANTITY IN THE BLUE HYD RESERVOIR, ALL STEPS WERE PERFORMED AS A CORRECTIVE ACTIONS