As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING TAXI IN, ENGINE NR 2 COWL VALVE OPEN LIGHT ILLUMINATED INTERMITTENTLY WITH SWITCH IN OFF POSITION. LIGHT REMAINED ILLUMINATED AFTER SHUTDOWN. ACFT GROUNDED. R & R NR 2 ENGINE THERMAL ANTICE VALVE IAW AMM 30-21-11. OPS AND LEAK CHECK NORMAL.