What was found
DURING TEST OF EMERGENCY LIGHTS VIA CIDS, THE LEFT CENTER EMERGENCY POWER PACK FAILED. MAINTENANCE REPLACED POWER SUPPLY PACK, OPERATIONAL CHECK OK.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
DURING TEST OF EMERGENCY LIGHTS VIA CIDS, THE LEFT CENTER EMERGENCY POWER PACK FAILED. MAINTENANCE REPLACED POWER SUPPLY PACK, OPERATIONAL CHECK OK.