As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT RETURNED TO PLATFORM AS A CONSEQUENCE OF DURING RIGHT ENGINE STARTED, ACCELERATION INCREASED SLOWLY. THE RIGHT ENGINE WAS VERIFIED AND FOUND ALL CORRECT. THE FCU WAS REPLACED IAW MM 73-20-01 AND ACCELERATION CHECK WAS PERFORMED IAW 71-00-00, ALL CORRECT. DUE TO THE TYPE OF FAILURE, RIGHT ENGINE WAS REPLACED IAW 71-00-02, TESTED CORRECT.