As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NR 1 ENGINE CONTROL LIGHT ON AFTER LANDING HAD NO THROTTLE CONTROL DURING TAXI IN. PERFORMED EEC BITE TEST IAW 73-21-00. EEC BITE PASSED. EEC FAULT HISTORY ONLY SHOWS MESSAGE NUMBER 78-31521. MESSAGE IS ASSOCIATED WITH NR 1 ENGINE T/R NOT IN COMMANDED POSITION. NO CURRENT FAULTS SHOW IN EEC NR 1.