As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SEA FLIGHT NR 2154 , DURING AUTOFEATHER TEST OF NR 2 PROP A RIGHT TRU CAUTION CAME ON TESTED SEVEN DIFFERENT TIMES WITH PROP RPM NO GOING BELOW 650. MAINTENANCE COMPLIED WITH ADJUST/TEST OF THE LEFT AND RIGHT TRU'S IAW DHC-8 AMM 24-31-505-508, OPERATIONAL CHECK GOOD. NO PARTS REPLACED. AIRCRAFT RETURNED TO SERVICE.