As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
APU MX LIGHT ILLUMINATED. CHECKED CDU FOUND APU LOW OIL FAULT 49-91227. SERVICED APU TO FULL 1QT. FOUND APU OIL LEAK ONE DROP PER. ALSO FOUND FWD INBD BOWL INDICATION PIN POPPED SHOWING RED. REPLACED STARTER GENERATOR FILTER AND LUBE FILTER, AND RESET DELTA P ON MAGNETIC DRAIN PLUG, REF MM 49-91-12, AND 49-91-13. REPLACED STARTER GENERATOR IAW MM 49-41-21 LEAKS AND OPS CHECKS GOOD.