As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS IN BASE MAINTENANCE: INOP LAVATORY D EMERGENCY EXIT LIGHT BOTTON AT AFT GALLEY AREA. REMOVED AND REPLACED LAVATORY D EMERGENCY EXIT LIGHT BOTTON AT AFT GALLEY AREA I.A.W AMM 33-51-18-000-001-A, AMM 33-51-18-400-001-A, PERFORMED OPERATIONAL CHECK OF EMERGENCY POWER SUPPLYUNITS BY BITE-CHECK I.A.W AMM 33-51-00-710-001-A TEST IS OK. GENERATED FORM ME-0470, REFER TO INDIVIDUAL SIGN OFF ENTRIES FOR WORK STEP PERFORMED.