What was found
EMERGENCY LIGHTS AT ROWS 8-14, MID LAV EMERGENCY LIGHTS, ROW 2 CEILING AND LEFT FWD EXTERIOR OVERWING EMERGENCY LIGHTS COME ON AND OFF WITH EMERGENCY LITE SWITCHES OFF. OCCURRED 3 TIMES AND HAS HISTORY. T/S IAW FIM 33-51 T 815, WDM 33-51-12-4, FOUND POWER SUPPLY M2503 INTERMITTENT TEST BUTTON MISSING WITH CONNECTOR NOT LOCKED. REPLACED POWER SUPPLY M2503 IAW AMM 33-51-06-960-803. TESTED PER SAME, OPS TEST GOOD.