As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING 'A' CHECK INSPECTION, FOUND THE EMERGENCY LIGHT NOT ARMED ANNUNCIATOR WOULD NOT COME ON. THE ANNUNCIATOR WAS DEFERRED PER MEL 33-26. INVESTIGATION FOUND A FAULTY BATTERY PACK. THE BATTERY PACK WAS REPLACED PER THE DC-9 MM AND THE AIRCRAFT WAS RETURNED TO SERVICE. (M)