As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ETOPS SIGNIFICANT SYSTEM - APU FAILED TO START TWO ATTEMPTS. BITE TEST DONE ON ECU SHOWING "LOW OIL PRESS" VIS CK APU OIL AT FULL. CLEANED ELECTRICAL PLUG OF LOW OIL TEMP SWITCH AND RERACKED APU ACU. RESTARTED, APU WORKS NORMALLY. ALL PARAMETERS NORMAL BITE TEST DONE. TEST OK. A/C OK FOR CONTINUE TO SERVICE REF AMM 49-61-00.