As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
TAXIING FOR TAKEOFF, THE NR 2 ENGINE CSD OIL PRESSURE LOW LIGHT STARTED FLICKERING. THE ENGINE WAS SHUT DOWN AND THE AIRCRAFT RETURNED TO THE GATE. MAINTENANCE FOUND THE CSD OIL COOLER RUPTURED. THE COOLER WAS REPLACED AND THE OIL WAS SERVICED. ACCOMPLISHED ENGINE RUN-UP AND SYSTEM CHECKED OK. AIRCRAFT RETURNED TO SERVICE.