As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
N1 & N2 INDICATION: DURING CLIMB WITH ENGINE AND WING ANTI ICE ON RIGHT ENGINE ONLY ABLE TO PRODUCE 78.1% N1 LEFT ENGINE MAINTAINED 92.2% N1 RAT INDICATED +71. POWER AND RAT RETURNED TO NORMAL WITH ENG & WING AI OFF. WE REPLICATED TIS CONDITION TWICE. PERFORMED DOWNLOADS FOUND FAULT F1-15. PERFORMED F1-15 FAULT ISOLATION TASKS. NO DEFECTS NOTED.