As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
OVERHEAD EMERGENCY EXIT SIGNS AT ROWS 16DEF AND 21DEF ILLUMINATE TEMPORARILY THEN EXTINGUISH. REMOVED AND REPLACED POWER SUPPLY AND BATTERY AT STA 988, REF AMM 33-51-07-402-018-02. OPERATIONS CHECKS NORMAL, REF AMM 33-51-07-402-018-02.