As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING AN INSPECTION IT WAS DISCOVERED THAT THE LOWER MAIN ROTOR HUB GREASE SEAL WAS NOT INSTALLED BUT LAYING AT TOP THE MAIN ROTOR SWASHPLATE INSIDE OF THE UPPER DUST BOOT. REMOVED MAIN ROTOR HUB INSPECTED AND REGREASED NEW SEAL INSTALLED WITH NORMAL RESISTANCE MAIN ROTOR HUB REINSTALLED.