As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
APU AUTO SHUTDOWN, PERFORMED FIM 49-11. FAULT TREE 998. NO DEFECTS NOTED, ALL POPOUT INDICATORS FLUSH. R & R THE OIL PRESSURE SCAVANGE FILTER IAW B767 AMM 49-27-03. SUSPECT DIFFERENTIAL PRESSURE SWITCH . DURING TROUBLESHOOTING, FOUND APU STARTER INOPERATIVE. REMOVED AND REPLACED OIL PRESSURE SWITCH AND STARTER. OPS CHECKED NORMAL IAW AMM 49-41-01-401.