As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GNDED. 2 ENG SLOW TO SPOOL TO FLEX POWER TAKEOFF ABORTED. FOUND NO FAULTS ON THE ECAM, ACCOMPLISHED ACCELERATION & DECELERATION TEST IAW AMM 71-00-00-700-011-B13 & BOTH ENGS WERE WITHIN LIMITS. ACFT WAS RETURNED TO SERVICE.