As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
TAIL ROTOR CONTROLS LOST ACCUMULATOR PRESSURE, FOUND VALVE STEM LOOSE. SUBMITTER STATED THIS HAS HAPPENED SEVERAL TIMES WITH ALL ACCUMULATORS (INCLUDING M/R) ON 3 DIFFERENT AIRCRAFT. SUBMITTER RECOMMENDS USING ACCUMULATOR WITH JAM NUT AND SHUT-OFF FOR VALVE STEM.