What was found
MDIS 683 33-50 0922 11APR22 MEM FACT U DURING SERVICE CHECK FOUND EMERG LIGHTS TEST SWITCH WOULD NOT ILLUMINATE R/I 11APR22 08:02 MEM U REASON CODE : PREMATURE REMOVAL/INSTALLATION OFF MPN: AD-3214-30 POS: 3 SRL: 83338 TAG NBR: 8050G9 ON MPN: AD-3214-31 CPN: 3310373 SRL: 256494 TAG NBR: 5631G9 FACT 11APR22 08:02 MEM U REMOVED AND REPLACED EMERG POWER SUPPLY BATTERY FEDEX (PN: AD-3214-31, SN: 256494) REF AMM 33-51-14-04. EPSU TEST GOOD.