What was found
ACFT 211GL SUSPECTED AUTOFEATHER FLT 5127 "PIR" 08/15/08 PILOTS REPORTED DURING FINAL DESCENT INTO LANDING, THAT POWER WAS REDUCED TO APPROX 500 LBS WITH PROPS FULL FORWARD. DURING POWER REDUCTION ONE OR BOTH PROPELLERS APPEARED TO FEATHER, THEN SURGE. POWER WAS INCREASED AFTER 10 SECONDS. ENGINES STABILIZED AND A SAFE LANDING MADE. DURING THE EVENT THE AFX DISABLE ILLUMINATED, THEN EXTINGUISHED WHEN POWER WAS REINTRODUCED. MAINTENANCE PERFORMED AFTER START CHECKLIST FIRST LIGHT ITEMS AS PER FSM 3.5.10 AND MM 61-10. OPERATIONAL CHECKS SATISFACTORY. (S)