As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ETOPS SIGNIFICANT SYSTEM: NR 1 ENG START APU GENERATOR FALLS OFF LINE FREQ'S BELOW 390. ACCOMPLISHED ADJUSTMENT AND TEST OF THE APU IAW B737-400 M/M 49-11-00 OPS CHECK NORMAL ACCOMPLISHED ENGINE START IAW B737-400 M/M 71-00-00 OPS CHECK NORMAL WITH APU NO DEFECTS.