As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PDX - LANDING GEAR WOULDN'T EXTEND USING NORMAL SYSTEM, ALTERNATE GEAR EXTENSION PERFORMED AND GEAR EXTENDED. LANDING GEAR VALVE ON HYDRAULIC POWER PACK REPLACED IAW MAINT MANUAL. GEAR OPS CHECKED GOOD ON GEAR SWING AND AIRCRAFT RETURNED TO SERVICE.