What was found
ON TAXI OUT, DURING FLIGHT CONTROL CHECK, CREW IN AIRCRAFT FOLLOWING BEHIND REPORTED SPARKS COMING FROM RT AILERONS, RETURNED TO BLOCKS. RAN NR 3 AND NR 4 ENGINES IAW 71-00-00, ACCOMPLISHED OPERATION CHECK OF GENERATORS IAW 24-21-01 PG 601. OPENING AND CLOSING FIELD WHILE VISUALLY CHECKING, NO DEFECTS NOTED. ACCOMPLISHED INSPECTION OF NR 3 AND NR 4 ENGINE INLET, TUBES, HOSES, ELECTRICAL LEADS AND REAR TURBINE THROUGH TAIL PIPE, NO DEFECTS NOTED. PERFORMED OPERATIONAL TEST OF AILERONS IAW 27-11-00 PG 501, SYSTEM CHECKS GOOD, NO DEFECTS NOTED. AIRCRAFT RELEASED TO SERVICE.