As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
#2 ENG ANTI ICE COWL VALVE OPEN LIGHT ON THE FWD OVERHEAD PANEL CYCLES ON AND OFF WITHOUT SWITCH ACTUATION, HISTORY OF CONNECTOR DP1303 BEING FOUND LOOSE PRI 2 ETOPS SIGNIFICANT SYSTEM. GROUNDED - YES. REMOVED AND REPLACED #2 ENGINE HARNESS MW0313 IAW B737-800 AMM 71-51-03. EEC TEST PASSED, NO FAULTS REF AMM 73-21-00-700-804-F00. TEST 12- ACTUATORS TEST PASSED REF AMM 71-00-00-700-807-F00.