As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SENSOR SIGNAL TRANSMITTING UNIT WAS RECEIVED NEW FROM AIRBUS. DURING MAST MOMENT PART 2 ADJUSTMENT- UNABLE TO MAINTAIN MAST MOMENT MINIMIZED BELOW 10%. MAST MOMENT FLUCTUATES MORE THAN 10% AFTER BEING MINIMIZED AS LOW AS 3% ON THE GROUND AT FLIGHT IDLE. SUBBED IN SSTU FOR TROUBLESHOOTING AND ACFT PASSED.