As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
EMERGENCY BATTERY PACK INOP MOUNTED ON THE CEILING PANEL JUST TO THE RIGHT OF THE FDR ACESS PANEL REMOVE AND REPLACE EMERGENCY BATTERY PACK MOUNTED ON THE CEILING PANEL JUST TO THE RIGHT OF THE FDR ACCESS PANEL REF. 737-900 AMM 33-51-06 REV 75