What was found
APU FAULT LIGHT ILLUMINATES WHEN STARTING APU. GROUNDED - YES. FOR MSG 49-89002 REF B737-9 IFIM 49-00-00-810-817 FAULT IS NOT PRESENT WHEN APU SWITCH IS PLACED ON OR APU MANT POWER SWITCH IS PLACED IN TEST, PRIOR TO GOING INTO EXISTING FAULT. NUMEROUS APU STARTS WITH NO FAULT LIGHT. REVIEW FAULT HISTORY ON OMF AND FOUND NO FAULT FOR ATA49, REVIEW FLIGHT LEG HISTORY DAY OF AND NO FAULT RECORDED. ALL STEPS HAVE BEEN COMPLETED FROM TECH SERVICES INPUT, CONSULTED WITH SEAMC.