As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LAS - CREW RPORTED RT ENGINE HYDRAULIC LIGHT REMAINED LIT, AFTER START-UP AND RT HYDRAULIC PRESSURE GAUGE INDICATED ZERO. MAINTENANCE FOUND HYDRAULIC PRESSURE NORMAL AFTER BYPASSING FLAP SYSTEM BY PULLING 'FLAP CONTROL' C/B. RT ENGINE HYDRAULIC PUMP AND FILTER WAS REPLACED PER MM. FLAP CONTROL VALVE WAS CHANGED DUE TO LEAKING AND HYDRAULIC POWER PACK CHANGED TO CORRECT LOW PRESSURE. ACFT RELEASED FOR SERVICE. (W)