What was found
RAMP REPORTS THAT SPARKS WERE COMING FROM APU DURING STARTUP AND FLUID WAS LEAKING ONCE IT WAS RUNNING, START SEEMED NORMAL EXCEPT STARTER LIGHT STAYED ON LONGER THAN NORMAL. REMOVED FROM SERVICE. PERFORMED VISUAL INSPECTION OF APU, PERFORMED OPS TEST IAW AMM TASK 49-00-00-710-801. NO LEAKS, OPS TEST NORMAL. NO SMOKE, NO SPARKS. NO PARTS REPLACED. AIRCRAFT RETURNED TO SERVICE.