As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER TAKEOFF, MASTER CAUTION WITH PUMP HYD NR 2 ANNUNCIATOR ILLUMINATED. HYD NR 2 PSI CYCLED BETWEEN 1600/1800. RAN CHECKLIST RETURNS TO DEPARTURE UNEVENTFULLY- NOTED LOSS OF FLUID ON RAMP. REMOVED PARKING BRAKE PRESSURE SWITCH AND INSTALLED NEW PRESSURE SWITCH IAW MM 32-45-01 BLEED BRAKES LEAK AND OPS CHECK GOOD ALL WORK DONE IAW MM 32-419