As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ENGINEERING REQUEST TO REPLACE THE APU ECU DUE TO NOT SENDING REQUIRED APU REP34 ETOPS SIGNIFICANT SYSTEM, REF ETOPS MANUAL SECTION E07-00-04. ACFT GROUNDED. ACCOMPLISHED TSR - REF MM 49-61-12. REPLACED ECU. 2 EA C/B'S CLOSED AND TAGS REMOVED. OPS NORMAL REF SAME. APU START AND OPERATION GOOD REF 49-11-00. SOFTWARE VERIFICATION GOOD REF 49-61-00, APU BITE.