As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LANDING GEAR WILL NOT RETRACT AND GIVING LOW PRESSURE WARNING. RETURN BACK TO STATION (SJU). ITEM DEFERRED ON MEL NR 29-01 AUTH NR 030060-C. ON 03-16-09 AT SJU (TAT: 30151.44 TAC: 28084), REMOVED AND REPLACED ACW DRIVEN HYD PUMP AS PER JIC NR 29-10-00. THIS ACTION CLEARS MEL NR 29-01 AUTH NR 030060-C.