What was found
L2 DOOR UPPER LIGHTS, 2 EACH, OUT OF THE 4 ARE OUT AND COACH SEATS 33F -37F ARE ALSO OUT. ALSO SEATS 33D-38D ARE ALSO OUT. DOOR 2 LEFT LIGHTS THAT WERE OUT ARE THE WORK LIGHTS, NOT THE EMERGENCY LIGHTS. WHEN WORK LIGHT SWITCHES DEPRESSED ON THE JUMPSEAT, LIGHTS ILLUMINATE. FOUND MESSAGE 33-11726. REMOVED AND REPLACED WCU 26 AT SEAT 39D REF. AMM DMC-B787-A-33-51-07-01A-520A-A AND DMC-B787-A-33-51-07-01A-720A-A. REQUIRES SOFTWARE LOAD AND OPS CHECK. ACCOMPLISHED SOFTWARE LOAD IAW MM 33-51-07-04A-750A-A. NO HELP. CONTINUED WITH FIM33-50-F1-E7A-421A-A, DISCONNECTED AND RECONNECTED FLOOR LIGHTS ONE AT A TIME. ONCE RECONNECTED ALL EMERGENCY LIGHTS OPS CHECK GOOD IAW MM 33-51-00-07A-343A-A.