What was found
R1 EMERGENCY EXIT SIGN, R1 SLIDE LIGHT AND EMERGENCY EXIT LOCATOR SIGN INOP DURING EMERGENCY LIGHT TEST. FOUND THAT AFTER AIRCRAFT HAD BEEN POWERED FOR OVER AN HOUR, ALL LIGHTS WOULD TEST, HOWEVER THE TEST ONLY LASTED APPROX 5-10 SECONDS, ALL OTHERS STAYED ON FOR APPROX. 1 MINUTE. AFTER TESTING, LIGHTS WOULD NOT TEST AGAIN. REMOVED AND REPLACED BATTERY M730 IAW AMM 33-51-07-2, OPS CHECK GOOD, LIGHT TEST NORMAL.