As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
BATT 2 O'TEMP MASTER WARNING MESSAGE ILLUMINATED IN CRUISE FLIGHT BATT NR 2 TEMP WAS OVER 70DEG AND CONTINUED TO RISE TO 100 DEG AFTER BATT NR 2 WAS TURNED OFF. REMOVED DEFECTIVE BATTERY AND INSTALLED NICAD BATTERY. NICAD SENT FOR NR 2 POSITION, WORK DONE IAW MM 24-34-00.