As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING DESCENT, THE NR 1 ENGINE ANTI-ICE VALVE DID NOT OPEN. COWL ANTI-ICE VALVES WERE SECURED. A SECOND ATTEMPT WITH ENGINE ANTI-ICE, OPS CHECKED NORMAL. ACFT GROUNDED. RAN THE NR 1 ENGINE, CYCLED THE NR 1 ENGINE ANTI-ICE SWITCH A NUMBER OF TIMES. OPS CHECKED GOOD IAW AMM 30-21-00-710-801. NO HISTORY 30 DAYS.