As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ETOPS SIGNIFICANT SYS - BTB L ENG OIL PRESSURE WENT TO ZERO DURING PWR FAILURE AT IDLE. PRESSURE RECOVERED WHEN POWER WAS RESTORED TEMPORARLY. PERFORMED FIM 79-33-00 FIG 105, NO DEFECTS NOTED AND FIM 79-33-00 FIG 104 NO DEFECTS NOTED. ACCOMPLISH ENGINE RUN UP TEST NR 3 SYS TEST NORMAL.