What was found
ON TAXI OUT OTHER AIRLINE NOTICED POTENTIAL FUEL LEAK NEAR RIGHT WING ROOT RETURNED TO GATE. DURING INVESTIGATION FUEL LEAK OBSERVED IN RT WING FRONT SPAR DRY BAY AT AFT END OF ENGINE FUEL FEED LINE CAUSED BY BROKEN COUPLING NUT. COUPLING NUT P/N AS1714D32 WASHERS P/N AS 1715-32 AND PACKING P/N MS2 9513-330. REPLACED BY NEW ACC AMM TASK 28-22-07-404-011-002 LEAK CHECK C/OUT BY WET MOTORING NO LEAK OBSERVED.