What was found
3964 RECEIVED HYD 1 LOW PRESS AFTER TAKEOFF. COMPLIED WITH QRH, AIR RETURN TO PHL. HYD 1 QTY IS ZERO. MSG TO ENG SHUTDOWN WAS 32 MINUTES. LANDING WEIGHT 46000.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
3964 RECEIVED HYD 1 LOW PRESS AFTER TAKEOFF. COMPLIED WITH QRH, AIR RETURN TO PHL. HYD 1 QTY IS ZERO. MSG TO ENG SHUTDOWN WAS 32 MINUTES. LANDING WEIGHT 46000.