What was found
ON PREFLIGHT OF THE EMERGENCY LIGHTING SYSTEM FOUND FLOOR LIGHT AT SEAT 3 ALONG WITH OVERHEAD LIGHT AT SEAT 3 NOT WORKING. ALSO RIGHT WING INSPECTION LIGHT NOT WORKING AS PART OF THIS SYSTEM. COMPLIED WITH QRH PROCEDURE AND LIGHTS STILL DO NOT WORK. PERFORMED EMERGENCY LIGHTS SYSTEM OPERATIONAL CHECK AND WAS ABLE TO DUPLICATE SQUAWK. GAINNED ACCESS AND REMOVED FAILED #2 EMERGENCY BATTERY AND INSTALLED CUSTOMER SUPPLIED REPAIRED BATTERY. CHARGED BATTERY FOR 60 MIN. PERFORMED EMERGENCY LIGHTING ADJUSTMENT TEST AND NO DEFECTS NOTED, VERIFIED ALL EMERGENCY LIGHTS ARE COMING ON. RESECURED ACCESS PANELS AROUND CABIN SEAT #3. REF AMM 33-50-06