As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS NOT GROUNDED: WIRELESS EMERGENCY LIGHTING SYSTEM CONTROL UNIT CONFIGURATION DID NOT AGREE WITH OTHER WIRELESS EMERGENCY LIGHTING SYSTEM CONTROL UNITS. MAINTENANCE REPLACED WIRELESS CONTROL UNIT PER AMM 33-51-07 AND ACCOMPLISHED SOFTWARE LOAD AND CHECKS.