What was found
APPROACH INTO KBZN AT ABOUT 14,000' THE EMER LIGHTS BEGAN TO FLICKER. EMER LIGHTS ARE OFF WITH THE SWITCH IN THE OFF POSITION. WITH THE SWITCH IN THE ARM POSITION AND POWER OFF, THE LIGHTS ILLUMINATED AND WERE STEADY. WITH THE SWITCH IN THE ON POSITION AND POWER OFF, THE LIGHTS REMAINED ON AND STEADY. ALLOWED THE LIGHTS TO REMAIN ILLUMINATED FOR 10 ADDITIONAL MINUTES WITH NO DEFECTS NOTED. GAINED ACCESS TO THE #1 & #2 EMERGENCY BATTERIES AS REQUIRED. PERFORMED GVI OF BOTH BATTERIES WITH NO OBVIOUS DEFECTS. DUE TO REPLACEMENT BATTERIES BEING ONSITE, MCC HAS ELECTED TO REPLACE THE BATTERIES. WHILE GAINING ACCESS TO THE #2 EMER BATT, TECHS FOUND THAT THE LAY AFT WALL MIRROR LATCH WAS BROKEN. REMOVED THE DAMAGED LATCH PN: 7311134-501 AND INSTALLED THE NEW LATCH PN: 7311134-501 IAW IPC 25-27-05 RECEIVED REPLACEMENT EMERGENCY LIGHT BATTERIES AND VERIFIED PAPERWORK. REMOVED FAULTY #1 EMERGENCY BATTERY P/N 74501S-00 S/N 007481 AND INSTALLED INSPECTED/TESTED EMERGENCY BATTERY P/N 74501S-00 S/N 006814 IAW MM 33-52-01. REMOVED FAULTY #2 EMERGENCY BATTERY P/N 745015-00 S/N 007252 AND INSTALLED REPAIRED EMERGENCY BATTERY P/N 7450LS-00 S/N 007471 PER MM 33-52-01. PERFORMED THE OPS TEST OF THE EMERGENCY LIGHTS IAW MM 33-52-01, WITH NO DEFECTS NOTED. CLOSED ALL ACCESS AS REQUIRED