What was found
FLT NR 0783 - EWR - EXCESSIVE NOSE WHEEL SHIMMY AND A SIGNIFICANT LOSS OF STEERING WAS OBSERVED AS THE NOSE GEAR TOUCHED DOWN DURING LANDING AT EWR. THE 'A' SYSTEM HYDRAULIC QUANTITY WAS NOTED AT ZERO AFTER THE AIRCRAFT STOPPED. MAINTENANCE FOUND THE NLG LEFT STEERING CYLINDER LEAKING. THE STEERING CYLINDER WAS REMOVED AND REPLACED. IN ADDITION, THE STEERING METERING VALVE WAS REPLACED AS A PRECAUTIONARY MEASURE. LEAK AND OPERATIONAL CHECKS WERE GOOD. (Z)