As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT 628, WAS NORMAL DURING CLIMB OUT AND CRUISE FLIGHT. UPON STARTING DESCENT OUT OF 7000 FEET, A HYD LIGHT ILLUMINATED ON THE CAP. THE HYDRAULICS WERE SHOWING A GREEN HYD LOW PRESS LIGHT. RAN THE CHECKLIST FOR THE ITEM AND LEVELED THE PLANE. AT THAT POINT CONTACTED ATC AND STOPPED OUR DESCENT. CONTACTED ATC AND REQUESTED RETURN TO DEPARTURE. DID NOT DECLARE AN EMERGENCY. RETURNED AND LANDED WITHOUT ANY EVENT. REPLACED GREEN SYSTEM HYDRAULIC PRESSURE SWITCH. OPS CHECKED GOOD.