As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FUEL PUMPS LOW PRESSURE LIGHT IS ON CTR R APON BLOCKING AT GATE DEN, FOUND CB FOR CNTR RIGHT BOOST PUMP LOCKED OUT. CNTR LEFT BOOST PUMP ON MEL WAS NOT LOCKED OUT. PULLED AND LOCKED OUT LEFT CNTR BOOST PUMP CB. RT BOOST PUMP OPS NORMAL.