What was found
THE ACFT EXPERIENCED A HIGH TEMP NR 1 HYDRAULIC SYSTEM LEADING TO A LOSS OF HYDRAULIC FLUID RESULTING IN A DECLARED EMERGENCY LANDING. AFTER INVESTIGATING THE CAUSE OF THE FLUID LOSS WE DISCOVERED THE NR 1 HYDRAULIC SYSTEM PRESSURE LINE, PN 604-75238-3 WAS CHAFED THROUGH RESULTING IN LOSS OF PRESSURE. THE PRESSURE LINE CLAMP WAS MISSING THE RUBBER ANTI-CHAFE RUBBER. ADDITIONALLY SINCE THE ENGINE DRIVEN PUMP WAS OPERATED AT A HIGH TEMPERATURE AND EXCEEDING THE MM REQUIREMENTS THE LT ENGINE DRIVEN HYDRAULIC PUMP WAS CHANGED.