What was found
(CAN) PILOT INITIATED START FOLLOWING TURNAROUND AND NOTICED PROP RPM FOLLOWING START WAS ONLY AT 500 RPM AND NOT AT THE NORMAL, ABOVE 1000 RPM AT ENGINE IDLE. ALSO HAD EIS FLASHING AMBER AND RED ON EIS AS PROP WAS OPERATING BELOW 950 RPM. PROP WAS NOT COMING OUT OF FEATHER POSITION. PILOT SHUTDOWN ENGINE. INVESTIGATION REVEALED A STUCK OPEN PROP FEATHERING SOLENOID WHICH DID NOT ALLOW UNFEATHERING OF PROP. ONCE SOLENOID COOLED DOWN SOLENOID FUNCTIONED NORMALLY. REPLACED OVERSPEED GOVERNOR WITH REPAIRED AND TESTED UNIT. (TC# 20070516003)