What was found
LAS/PDX - FLT NR 671 - TWENTY MILES FROM PDX, CREW REPORTED LOSS OF 'A' SYSTEM HYDRAULIC FLUID. AIRCRAFT LANDED WITHOUT FURTHER INCIDENT AFTER DECLARING AN EMERGENCY LANDING. MAINTENANCE FOUND RUPTURED LINE AT THE 'A' SYSTEM HYDRAULIC MODULE. REPLACED LINE, INSPECTED PRESSURE AND CASE DRAIN FILTERS, NO CONTAMINATION NOTED. AIRCRAFT RETURNED TO SERVICE. (M)