As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NR 1 ENGINE COWL ANTI-ICE VALVE WON''T INDICATE OPEN IN FLT. GOOD EPR DROP WHEN SWITCHED OPEN. REPLACED NR 1 ENGINE COWL ANTI-ICE VALVE. NO HELP. FOUND BAD GROUND TO PIN B OF VALVE CANNON PLUG. INSTALLED NEW TERMINAL TO GROUND. OPERATION CHECKS GOOD WITH ENGINE RUNNING AND WITH ENGINE OFF.