What was found
TWO APU START ATTEMPTS RESULTED IN APU FAULT LIGHT ILLUMINATION. GROUNDED - YES. PER B737-9 FIM TASK 49-40-00-810-818 VERIFIED NO VISUAL DAMAGES TO STARTER AND CANNON PLUG ATTACHING. AFTER FURTHER INVESTIGATION, DELTA P POPPED ON LUBE MODULE FILTER. REMOVED AND REPLACED LUBE MODULE FILTERS. FOR PRECAUTIONARY MEASURES REMOVED & INSPECTED CHIP DETECTOR FOR CHIPS. NO CHIPS FOUND. REMOVED, INSPECTED AND REPLACED STARTER GENERATOR FILTER. NO PARTICULATES FOUND. OPS CHECK START APU 5 TIMES. OPS CHECK GOOD. LEAK CHECK GOOD. IAW B737-9 AMM 49-91-81; 49-91-12. THIS CLEARS MEL 49-11-01.