As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
R ENG ANTI-ICE VALVE STUCK IN CLOSED POSITION WITH SWITCH ON @ 5000 FT CYCLED SWITCH THEN WORKED PROPERLY. GROUNDED - YES. PERFORMED OPS TEST OF R/H ENGINE ANTI-ICE VALVE NO FAULTS WERE FOUND, OK FOR CONT SVC REF B737-900 AMM 30-21-00.