What was found
CABIN EMERGENCY LIGHTS CAME ON BY THEMSELVES WITH SWITCH IN THE ARM POSITION. EXTINGUISHED BY THEMSELVES APPROX 5 MINS LATER DURING CLIMB. AFTER LANDING, WITH THE MAIN SHIP BATTERIES BOTH OFF, THE EMER LIGHTS TURNED ON & OFF NORMALLY WITH THE SWITCH. RECOMMENDED C/W SLSOS-33-0005 REV.OS, REVIEWED SIL & COMPLETED T/S FIM 33-50-00, POWERED NC & VERIFIED WITH MAIN BATTERIES ON, EMERGENCY LIGHTS OPS AS DESIGNED IN ARM & ON/OFF. TURNED MAIN BATTERIES OFF, & CONFIRMED WHEN EMERGENCY LIGHTS IN ARM, LIGHTS ILLUMINATED. CONFIRMED BREAKERS ARE ENGAGED FOR EMERGENCY LIGHTS & HOT BATTERY BUSS CB. CONFIRMED SINCE BOTH BATTERIES ARE ILLUMINATING WHEN COMMANDED/TESTED & NO FLICKERING OF ANY LIGHTS NOTED. BATTERY PACKS CHKD GOOD. CYCLED ON EMERGENCY LIGHTS SEVERAL MORE TIMES TO RESET INERTIA SWITCHES & PERFORMED INERTIA SWITCH REACTIVATION IAW AMM 33-52-17. NO HISTORY FOR EMERGENCY LIGHT ISSUES, OPS CHKD GOOD.