N751JC

ATA 2910

AC WAS ENROUTE, DURING FLIGHT THE CREW NOTICED THE NR 2 HYDRAULIC QUANTITY GOING DOWN. CREW SHUTOFF THE STANDBY HYD PUMP IAW THE CHECK LIST. CREW CONTINUED TO MONITOR THE HYD QUIT DURING THE FLIGHT. DURING THE APPROACH, THE 3 HYDRAULIC PUMP WARNING LIGHT CAME ON AND HYD PRESSURE DROPPING. PILOTS DIVERTED, FOR FIELD LENGTH RESTRICTIONS. AC LANDED. IN THE AFT BAGGAGE COMPARTMENT BAY, THE LEAK APPEARS TO BE LOCATED WHERE THE LINE HAD COME INTO CONTACT WITH A TOOL THAT HAD GROUNDED TO SOME SORT OF A POWER SOURCE. THERE IS NOT ANY POWER SOURCE LOCATED IN THE SAME VICINITY WERE THE LINE IS LOCATED. SUSPECT LINE MAY HAVE BEEN DAMAGED DURING SOME TYPE OF HEAVY MAINTENANCE OR ELECTRICAL MODS TO THE AC. THE HYDRAULIC LINE WAS CHANGED AND SYS LEAKED CHECKED AND OPS CHECKED WITH NO DISCREPANCIES. THE LINE IS THE ORIGINAL HYDRAULIC LINE FROM THE FACTORY. (K)

ATA 5797

DURING A ROUTINE BLOCK INSPECTION, A VISUAL INSPECTION OF THE WINGS REVEALED MULTIPLE WIRES SHOWING DAMAGE IN THE FLAP WELL AREA, FWD OF THE IB FLAPS. THE CAUSE DAMAGE TO THE WIRE BUNDLES F50B602101A1 AND F50B602102A1 COULD NOT BE DETERMINED. SOME SHOWED SIGNS OF HEAT DAMAGE AND OTHERS SEEMED FRAYED OR CHAFED OR CHEWED. NO SYSTEM MALFUNCTIONS WERE NOTED BY THE FLIGHT CREW PRIOR TO THE NSPECTION. THE AC WAS ON AN INTERNATIONAL FLIGHT PRIOR TO THE INSPECTION. THE WIRES WERE REPLACED IAW THE MFG MM AND STANDARD PRACTICES AND ADDITIONAL SHIELDING WAS APPLIED. INSPECTION OF OTHER AC IN THE FLEET SHOWED NO SIMILAR DAMAGE. RECOMMENDATIONS ARE TO SHIELD WIRE BUNDLES BETTER AND PAY MORE ATTENTION TO FLAP WELL ARE