As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LEFT RESERVOIR LIGHT ON OVERHEAD ILLUMINATED. LOW PSI RESERVOIR LIGHT ON AFTER TURNING ON AND OFF ELEC PUMPS, RAN LEFT ENG AND THE LOW PSI RESERVOIR LIGHT STAYED OUT. WRENCH CHECKED LINES AND FOUND NO LEAKS. INSPECTED PLUMBING AND B-NUTS, NO LEAKS FOUND. REPLACED RESERVOIR PRESSURE SWITCH PER MM. LIGHT REMAINED OUT USING APU WITH PUMP, PACKS AND EAI'S SELECTED ON. OPS CHECKS OKAY.