As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
OPERATIONAL CHECK OF CABIN EMERGENCY LIGHTS {A3NB-33-3-6012} - EPSU UNIT AFT L 33-51-38 RPLCD EPSU AND NEW BATT, NO HELP. SLAVED IN NEW EPSU AND NEW BATT, NO HELP, RESULTS IN NO COMM AT CIDS PANEL TEST. PLEASE VERIFY PROPER EPSU PART NUMBER IS CURRENTLY INSTLD. NO TIME 2 EACH CENTER CEILING PANELS RMVD FOR ACCESS BELOW UNIT PARTS INFO. VERIFIED EFFECTIVITY WITH ENGINEER. P/N3214-62-10 IS NOT VALID REF IPC 33-51-04-07 ITEM 10A AND 10E. R/R PSU (13WL) REF AMM 33-51-38. OPC GOOD. NO FURTHER DEFECTS NOTED.