What was found
JAX - FLT 2675 - EN ROUTE FROM BOS-TPA, NEAR SAV, SYSTEM A HYDRAULIC QUANTITY SLOWLY DROPPED FROM REFILL (RF)TO ONE GALLON IN ABOUT 2 HOURS OF FLIGHT. NO LOW PRESSURE OR OVERHEAT LIGHT WAS NOTED. CREW RECYCLED HYDRAULIC QUANTITY BREAKER WITH NO CHARGE. CREW ELECTED TO DIVERT TO JAX DUE OT THUNDERSTORMS AT TPA. NO EMERGENCY WAS DECLARED AND THE FLIGHT LANDED WITHOUT INCIDENT. UPON LANDING, SYSTEM A HYDRAULIC QUANTITY INDICATED FULL. MAINTENANCE FOUND NO DISCREPANCY. REMOVED AND REPLACED HYDRAULIC QUANTITY INDICATOR AS PRECAUTIONARY. OPERATIONAL CHECK GOOD. (M)