As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
APU GEN KICKED OFFLINE, 0 VOLTAGE/ 0 FREQUENCY DISPLAYED. GROUNDED - YES. REPLACED APU START CONVERTER UNIT IAW B737-900 AMM 49-41-61. ETOPS GROUND VERIFICATION SUCCESSFUL. ALL OTHER REQUIRED OP CHECKS GOOD IAW B737-900 AMM 24-21-00 49-41-61 AND 30-42-00.