As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING ETOPS PREDEPARTURE CHECK, FOUND MSG NR 49-41-244 FOR APU BITE TEST. START CONVERTER SHOWS FAILED GENERATOR DIODE. T/S IAW FIM 49-40-00-810-806. FOUND START CONVERTER UNIT FAILED. REMOVED AND REPLACED START CONVERTER UIT IAW MM 49-41-61. OPS CHECK GOOD. (K)