What was found
TUS - DIVERSION - FLT 0179 - WHILE EN ROUTE FROM LAS TO MEX THE #2 ENGINE STARTED A BLEED SURGE, THE X-BLEED VALVE OPENED AND SURGE CONTINUED IN X-BLEED AUTO WITH BOTH ENGINES SURGING SIMULTANEOUSLY. AUTO THRUST WAS TURNED OFF AND SURGE ON BOTH ENGINES STOPPED FOR APPROXIMATELY 3 TO 4 MINUTES THEN STARTED TO SURGE AGAIN. EPR RANGED FROM 1.20 TO 1.40 DURING SURGES ON BOTH ENGINES, DIVERTED TO TUS AND LANDED WITHOUT EVENT. MAINTENANCE TROUBLESHOT AND FOUND A SENSE LINE LEAKING ON THE #2 ENGINE. REPLACED SENSE LINE AND RAN BOTH THE #1 AND #2 ENGINE AT POWER WITH BLEED PRESSURE STEADY AT 46 PSI AND NO FLUCTUATION.