As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ENG ANTI ICE ON #2 REMAINED BRIGHT BLUE AMB TAI ABOVE #2 N1. GROUNDED - YES. TROUBLESHOT PER B737-900 FIM 30-21-00 VALVE FOUND STUCK CLOSED. REPLACED ENGINE COWL TAI VALVE REF B737-900 AMM 30-21-11. GROUNDING TEST GOOD. OPS CHECK GOOD AND LEAK CHECK GOOD REF AMM 30-21-11.