As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ENGINE DECELERATION, FOUND SEVERAL TEST POINTS TO BE SLIGHTLY EARLY, BUT WELL WITHIN SERVICE LIMITS. SPLIT UNIT AND INSPECTED INTERIOR OF DRIVE BODY. DURING INSPECTION OF DRIVE BODY INTERIOR FOUND NO DISCREPANCIES. COULD NOT DETERMINE ANY REASON FOR THIS UNIT TO HAVE CAUSED AN ENGINE DECELERATION.