As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ETOPS SIGNIFICANT SYSTEM: APU FAULT LIGHT ON AND WILL NOT START. T/S PER B737 FIM 49-30 TASK 801 FOUND CONNECTOR AL0675B IMPROPERLY INSTALLED IN LT MLG WHEEL WELL. RE-INSTALLED CONNECTOR. APU OPS CHECKED GOOD PER B737 AMM 49-11-00. APU FUEL SHUT OFF VALVE CHECKS GOOD PER B737 AMM 49-11-00 APU FUEL SHUTOFF VALVE CKS GOOD PER B737-800 FIMM 49-30-801.