What was found
AFTER TWO (2) 30MIN CHARGING CYCLES THE LIGHTS ASSOCIATED WITH BATTERY PACK #4 WERE VERY DIM AND STARTED TO FADE WHILE ON. T2PL6D0OCCL8Z - REMOVED #3 BATTERY PACK PN OFE 2503, SN OFF: 42497 AND INSTALLED NEW PART PN ON 2503, SN ON: 49888. PERFORMED UNSA TISF ACTOR Y OPERATIONAL TEST OF TB BATTERY PACK, FOUND BATTERY PACK WOULD ST A Y ON ALL THE TIME REMOVED #3 BATTERY PACK PN OFF 2503, SN OFF: 49888 AND INSTALLED ORIGINAL BATTERY PACK PN ON2503, SN ON: 42497. ALL WORK IAW CESSNA 680A AMM33-50-06.