As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MIA - CREW REPORTED LEFT ENGINE DRIVEN PUMP PRESSURE LIGHT ILLUMINATED AND QUANTITY WENT TO ZERO. EMERGENCY DECLARED FLIGHT LANDED MIA WITHOUT INCIDENT. DEFERRED LEFT HYDRAULIC SYSTEM INOPERATIVE PER MEL. REPLACED HYDRAULIC QUANTITY MONITOR ON 05/21/2012 AT BOS. SYSTEM GROUND CHECK NORMAL OPERATION.