What was found
FLT NR 0424 - JFK - THE NR 1 ENGINE OIL QUANTITY BEGAN TO DROP IN FLIGHT WITH AN ASSOCIATED DROP IN PRESSURE. THE NR 1 ENGINE WAS SHUT DOWN. WHILE ON APPROACH TO EWR WINDSHEAR WAS ENCOUNTERED, APPROACH WAS ABORTED AND AIRCRAFT WAS DIVERTED TO JFK WHERE IT LANDED WITHOUT INCIDENT. MAINTENANCE FOUND THE NR 1 ENGINE OIL LINE TO DIFFERENTIAL PRESSURE SWITCH CRACKED. THE LINE WAS CAPPED OFF. A DECISION WAS MADE TO REPLACED THE NR 1 ENGINE AS A PRECAUTIONARY MEASURE DUE TO HISTORY OF OIL LOSS ON THIS ENGINE. (M)