What was found
CLT/IAD - FLT 1706 - WHILE CLIMBING OUT OF CLT AT 8,000 FEET, THE CREW NOTICED THE NR 1 HYDRAULIC SYSTEM FLUID QUANTITY WAS DROPPING AND WITHIN 5 MINUTES IT READ ZERO QUANTITY. CREW DECLARED AN EMERGENCY AND FLIGHT RETURNED TO CLT. FLIGHT LANDED CLT WITHOUT FURTHER INCIDENT. MAINTENANCE INSTALLED A TEMPORARY SERVICEABLE LINE ON AILERON SYSTEM NR 1 RETURN LINE. HYDRAULIC PUMPS TESTED NORMAL. MAINTENANCE REMOVED THE TEMPORARY LINE AND INSTALLED A PERMANENT LINE ON 12-10-97. (X)