What was found
FLT 574 - AFTER TAKEOFF, LEFT HYDRAULIC TEMP HIGH LIGHT CAME ON. AIRCRAFT RETURNED TO ATLANTA. REMOVED AND REPLACED NR 1 ENGINE DRIVEN HYDRAULIC PUMP. P/N AS66411LS, S/N OFF 165614, S/N ON 179506. OPS CHECK GOOD, NO LEAKS FOUND IAW MM CHAPTER 29-10-5.