As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PILOT REPORT: AIRPLANE RETURN TO RAMP DUE TO TECHNICAL PROBLEMS ( HYD SYS QTY). DURING INSPECTION FOUND THE POWER TRANSFER UNIT PRESSURE FILTER MODULE WITH LEAKAGE. REMOVED AND REPLACED THE PTU PRESSURE FILTER MODULE IAW AMM 29-22-02 PAGE 401. OPS TEST OK.