What was found
THE AIRCRAFT HAS HAD A HISTORY OF DIRECTIONAL GYRO FAILURE. AT INSPECTION, WATER WAS RUN OVER THE AFT FUSELAGE AND IT WAS DISCOVERED THAT WATER WAS COMING IN AT THE AFT FUSELAGE ATTACH HARDWARE ACCESS PANELS RUNNING DOWN THE STRINGER JUST UNDER ATTACHING HARDWARE AND DRIPPING ON TOP OF GYRO. THE PANEL WAS REMOVED, CLEANED, AND REINSTALLED WITH SEALANT.