What was found
FROM PILOTS REPORT THRU PRISM SMS: IN CRUISE AT 28,000 FT LEFT HAND ENGINE SEEMED TO WANT TO GO INTO FEATHER. HAPPENED TWO TIMES. DID A PRECAUTIONARY LANDING IN GALENA. SUSPECTED THE LOW PRESSURE SWITCH FOR AUTOFEATHER AFTER DEBREIF WITH THE PILOT. STATED THE ENGINE HAD A SLIGHT SURGE, BUT AUTOFEATHER WAS ENGAGING. THIS HAPPENED BRIEFLY TWICE IN FLIGHT AND DID NOT REPEAT THE REMAINDER OF THE FLIGHT THRU LANDING AT GALENA. SWITCH PN 50-389121-25, SN 2446 WAS REPLACED WITH A SERVICEABLE UNIT, SN 2390. GROUND RUNS WERE SATISFACTORY AND CHECK FLIGHT WAS PERFORMED. NO ISSUES ON THE 1.2HR FLIGHT BACK TO ANC. AIRCRAFT WAS RETURNED TO SERVICE.