As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(LOG 0313346) REPEAT WRITE UPS FOR EMERGENCY LIGHTS ON AT 1R PLZ SET UP TO T/S PER FIM 33-50-00-810-801. T/S PER B737 FIM 33-50-00-810-801, FAULT COMFIRMED, R/R BATTERY PACK AND POWER SUPPLY (M2816) FWD CANIN. AS PER B737 AMM 33-51. OPS TEST OK.