What was found
WHILE PERFORMING TASK CARD 78233001. THE EMERGENCY LIGHTS NEAR SEATS 16ABC, AND 25ABC, SEATS 16 THRU 24DEF, AND THE AFT GALLEY CENTER LOWER CEILING PANEL WENT OUT BEFORE THE 15 MIN LIMIT. AFTER A DEEP CYCLE CHARGE. ACFT GROUNDED. REMOVED, REPLACED, AND TESTED M1694, M1672, M1673, & M1671 POWER SUPPLY BATTERY PACKS IAW AMM 33-51-06-960-805. TESTS PASS, OK FOR SERVICE.