As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING PREFLIGHT TEST EMER LTS, "EMER LT BAT 1 LO" MSG. DEFERRED EMERGNECY LIGHTING SYSTEM IAW MEL 33-50-4 DMP ACCOMPLISHED, PLACARD INSTALLED. M 811922 ASSIGNEDR/R EMERGENCY POWER SUPPLY BATTERY PER AMM 33-51-01-000-802. OPS TEST GOOD PER AMM TASK 33-51-01-000-802 ESR IPC 33-51-01-05. THIS CLEARS M811922