As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DCA/LGA - FLT 6431 - HYDRAULIC SYSTEM 'A' FAILURE WHILE ON TAXIWAY PRIOR TO DEPARTURE. REPLACED LEAKING SYSTEM 'A' ELEVATOR FLIGHT CONTROL MODULE PER MM 27-30-91, EXAMINED SYSTEM 'A' CASE DRAIN FILTERS. REPLACED CASE DRAIN FILTERS PER MM 29-11-41. RAN ENGINES AND OPERATED ALL HYDRAULIC SYSTEMS, OPERATION CHECK NORMAL. (X)