As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LGA/DCA - FLT 6491 - IN CRUISE FLIGHT, LOST ALL SYSTEM A-HYDRAULIC FLUID AND PRESSSURE. DIVERTED TO BWI. FOUND FLAP MOTOR DRIVE LEAKING, REPLACED SAME, MM 27-51-61. SERVICED HYDRAULIC SYSTEM 'A'. REPLACED NR 1 AND NR 2 ENGINE HYDRAULIC PUMP CASE DRAIN FILTERS. OPERATION OF A-SYSTEM PER MM 27-51-00, CHECKED OK. (X)