What was found
RH CABIN SIDEWALL LIGHTS BETWEEN ROWS 21 AND 29 INOP. PLACED ON MEL 3321A. DEFERRED DIRECTLY BY TOMC REPLACED LIGHT ASSY'S BETWEEN ROWS 21 AND 29 M&E # 60-3321-3-0005, NO HELP. PHASE 2 TEST SHOWS NO COM 21-29 RIGHT. FURTHER AVIONICS T/S REQUIRED NEEDS SOFTWARE UPDATE *DM* ASSIST: ATTENDANT CONTROL PNL CONFIG CK AVAIL @ AMM 23-42-03-700-801; SOFTWARE LOAD @ 23-42-03-470-801; BITE IN AMM 23-42-03-740-801. INCREASED M/H & GRND TIME TO 3. REPLACED SIDEWALL LIGHT 323-21-00, OPS CHECKS GOOD