As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PSC- AFTER TAKEOFF WHEN GEAR WAS SELECTED UP NR 2 HYD PRESSURE AND QUANTITY DROPPED TO ZERO. NR 2 ENGINE HYDRAULIC PUMP ILLUMINATED. MLG REMAINED RED, WHILE NOSE GEAR RETRACTED. LT MLG DOOR DID NOT OPEN, THE NOSE AND RT GEAR DOOR REMAINED AMBER. NR 2 HYD PUMP OPERATED WITHOUT FLUID FOR 23 TO 25 MINUTES. AIRCRAFT RETURN TO FIELD WITHOUT INCIDENT. REMOVED AND REPLACED NR 1 MLG SEQUENCE VALVE. OPERATIONAL CHECKS GOOD. AIRCRAFT RETURNED TO SERVICE.