What was found
AFTER ENGINE START AND MOVING CONDITION LEVERS TO MAX. THE #2 PROP HUNG AT 450 RPM FOR 10 SECONDS AND THEN SURGED TO 750 RPM AND THEN SETTLED AT 660 RPM. A POWERPLANT MESSAGE APPEARED ON THE ED. RETURNED TO GATE AND REMOVED FROM SERVICE. FOUND #2 ENGINE FAULT 238 A+B, 230B. C/W FIM TASK 61-20-05-810-829. FAULTS CLEARED AND DID NOT RETURN AFTER OSG TEST. POWERPLANT MESSAGE CLEARED. NO OTHER DEFECTS NOTED. RETURNED TO SERVICE. NO PARTS REPLACED.