What was found
GROUND MAINTENANCE WHILE PERFORMING PREVENTIVE MAINTENANCE FOUND THE EMERGENCY LIGHT SYSTEM WOULD NOT TEST. THE SYSTEM WAS INVESTIGATED AND THE BATTERY POWER SUPPLY WAS REPLACED IAW DC-10, MM 33-51-01. (X)
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
GROUND MAINTENANCE WHILE PERFORMING PREVENTIVE MAINTENANCE FOUND THE EMERGENCY LIGHT SYSTEM WOULD NOT TEST. THE SYSTEM WAS INVESTIGATED AND THE BATTERY POWER SUPPLY WAS REPLACED IAW DC-10, MM 33-51-01. (X)