As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
APU FAILED WITH FAULT LIGHT. STARTED APU UNABLE TO CONFIRM DISCREPANCY. PERFORMED BITE CHECK OF APU. FOUND FAULT CODE 49 41012 FOR FLT LEGS 0 1 & 2 & 49 41248 FOR FLT LEGS 3 & 4 PERFORMED FIM 49 40 00 810 803 A F.1 4(A E). REPLACED STARTER/GEN REF MM 49 41 31 & ALSO REPLACED STARTER CONVERTER UNIT REF MM 49 41 61. ALL OPS & LEAK CHECKS GOOD.