As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PILOT OBSERVED A LOW HYDRAULIC PRESSURE INDICATION WHILE TAXING AND RETURNED TO BLOCK. TROUBLESHOOTING DETERMINED THE HYDRAULIC PUMP ELECTRICAL CONTACTOR WAS AT FAULT. INSTALLED A REPAIRED CONTACTOR AND PERFORMED NUMEROUS HYDRAULIC SYSTEM AND LANDING GEAR RETRACTION CHECKS. HYDRAULIC SYSTEM OPERATIONAL CHECKS WERE FOUND TO BE SATISFACTORY.