As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE REMOVING MAIN ROTOR YOKES WATER CAME OUT OF AREA OF MAIN ROTOR DRIVE BUSHINGS AND MAIN ROTOR BOLTS. DRIVE PLATE WAS FOUND NOT TO BE SEALED PROPERLY AND 2 MAIN ROTOR BOLTS WERE FOUND TO HAVE CORROSION PITTING. REPLACED BOLTS AND SEALED PROPERLY.