As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING A 24-MONTH PITOT/STATIC SYSTEM CERTIFICATION, ALL STATIC DRAIN VALVES WERE FOUND SEALED WITH 'RTV' SILICON SEALANT. ONE DRAIN VALVE SPINDLE WAS FOUND TO PASS THROUGH VALVE BUSH WHEN THE STATIC DRAIN WAS CLEARED OF 'RTV'. THE SPINDLE HAD BEEN ALTERED TO PASS THROUGH THE DRAIN BUSH.