What was found
DURING HEAVY MAINTENANCE FINAL TEST OF CABIN EMERGENCY LIGHTING, LIGHTS DO NOT ALL ILLUMINATE IN AFT CABIN AREA R & R BATTERY IAW AMM 33-51-00
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
DURING HEAVY MAINTENANCE FINAL TEST OF CABIN EMERGENCY LIGHTING, LIGHTS DO NOT ALL ILLUMINATE IN AFT CABIN AREA R & R BATTERY IAW AMM 33-51-00