As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SEA FLIGHT NR 2230, AFTER PUSHBACK, RAN THE DAILY CHECKS ON THE AUTO FEATHER SYSTEM, THE NR 2 SIDE WOULD NOT FEATHER. UPTRIM LIGHT CAME ON AND ARM LIGHT COMES ON, THEN THERE IS NOT A FEATHER ALTERNATE FEATHER NEVER CAME ON THEN THE AUTO FEATHER ARM LIGHT WENT OUT. MAINTENANCE REPLACED THE TSCU. OPERATIONAL CHECK GOOD. AIRCRAFT RETURNED TO SERVICE.