As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 200 - TTN-BED - ON PREFLIGHT, INSPECTION EXIT SIGNS AT FORWARD CABIN AND AT FORWARD EMERGENCY EXIT INOPERATIVE. MAINTENANCE CLEANED CONTACTS ON BATTERY PACKS, OPS CHECK GOOD IAW DHMM 33-51-00. REMOVED AND REPLACED BATTERY PACK AS PRECAUTIONARY MEASURE IN BUF. (M)