As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
INSPECTION TYPE:N/A "EMER LIGHTS BAT 1 LO" L1 MSG ON PREFLIGHT TEST OF EMER LIGHTS QRH PROCEDURES FOLLOWED. EMERG LT BAT 1 LO DEFERRED PER MEL 33-50-4, CNTRL # M 671464 ASSIGNED DMP 33-50-4 C/W PLACARD INSTALLED. REMOVED AND REPLACED EMERGENCY POWER SUPPLY REF AMM 33-51-01-401. DMP REVERSERED PLACARD REMOVED.