As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
EMERGENCY BATTERY PACK M1673 FAIL TEST <[01]. REMOVED AND REPLACED M1673 EMERGENCY BATTERY PACK AND PERFORMED A GOOD M1673 EMERGENCY BATTERY PACK TEST IAW AMM 33-51-06-960-805 AND AMM 33-51-00-710-801.; [02] VERIFIED CORRECTIVE ACTION 1.