As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
EMERGENCY BATTERY PACK AT POSITION M1673 FOUND INOP<[01] REMOVED AND REPLACED EMERGENCY BATTERY PACK AT POSITION M1673 IN REF WITH B737 AMM 33-51-06-960-805.EMERGENCY BATTERY PACK INSTALLATION TEST NORMAL.;[02] VERIFIED REPLACEMENT OF BATTERY PACK AND TEST.