What was found
30 MIN INTO FLIGHT, AT FL 370 RECEIVED LEVEL ONE BATTERY DISCHARGE FOR 10 - 15 SECONDS, FOLLOWED BY BATTERY CHARGE FOR 5 SECONDS. BATTERY SHOWED 29V & CHARGED TO 31 VOLTS & REMAINED THERE TILL SHUTDOWN. BATTERY DISCHARGE ALERT CLEARED AFTER BATTERY CHARGE TO 31 VOLTS. DURING PERIOD OF BATTERY CHARGING RECEIVED AURAL TIRE FAILURE 3X CONFIG PAGE NORMAL. R & R BATTERY CHARGER IAW AMM 24-34-03-4, ALSO R & R TWO SHIP BATTERIES IAW AMM 24-34-02-4. REFERENCE MTSI 24-00 7935, R & R ACFT MODULAR POWER UNIT IAW AMM 24-33-03-4 AS A PRECAUTION, DUE TO HISTORY. BATTERY CHARGES & SHUTS DOWN NORMALLY IAW AMM 24-34-03-5, ALL INDICATIONS NORMAL.