As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NUMBER 1 ENGINE N1 AND THE NUMBER 1 ITT INDICATIONS WERE FLICKERING ON AND OFF DURING DESCENT FOR APPROX. 2 MINUTES BEFOR RETURNING TO NORMAL. REMOVED FROM SERVICE, INTERROGATED CMC, FOUND FAULT CODE 73217426E1B. C/W FIM TASK 73-21-00-810-831-A. R & R LT ENGINE FADEC REF AMM TASK 73-21-000-801-A/400-801-A. OPS CHECK GOOD. NFDN. RETURNED TO SERVICE.