As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PDX FLIGHT NR 2466: DURING CLIMB, NR 2 PROP DROPPED TO 890 WHILE NR 1 REMAINED AT 900. PILOT TAPPED NR 2 CONDITION LEVER IN DETENT AND RPM RETURNED TO 900. ONE MINUTE LATER, NR 2 RPM JUMPED TO 910 RPM AND POWER PLANT MESSAGE APPEARED ON ED. MESSAGE REMAINED ON DURING THE REST OF THE FLIGHT. AIRCRAFT RETURNED TO FIELD. MAINTENANCE REMOVED AND REPLACED NR 2 PROPELLER IAW MTC 6610003 AND MTC 6610004. OPS CHECKS GOOD. NO LEAKS NOTED. AIRCRAFT RETURNED TO SERVICE.