What was found
AS PER N786UA (2786) HANGAR NON-ROUTINE PICK-UP SHEET (DATED ON: 14 JUL 2025) ITEM 1: DURING CABIN SURVEILLANCE BY DOOR L2, SMOKE WAS NOTICED COMING FROM CEILING PANEL. FOUND EMERGNECY LIGHT BA TTERY PACK (M33099) EMITTING SMOKE, TECH RAN TO COCKPIT AND PULL ED C/B THEN REMOVED ELECTRICAL CONNECTOR, SMOKE CLEARED REF TO HAECO NON-ROUTINE NO.9471449, SUPPORT TASK. THIS L/P FOR BATTERY REPLACEMENT INFO. CARRIED OUT WI RE & CONNECTOR CHECK AND AREA CONDITIONAL CHECK AND REPLACED THE M33099 POWER SUPPLY AND BATTERY PACK. THEN TEST NORMAL AS PER WDM33-51-14, 33-51-18 REV 92 AMM 05-51-58-800-801 REV 104 AMM 33-51-06-960-802, 33-51-06-960-803 REV 104.