As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
EMERGENCY POWER PACK, M1670M FAILS EMERGENCY LIGHTING FUNCTIONAL CHECK, BATTERY DISCHARGES IN LESS THAN 13 MINS (REF. AAR NR 100 010615). REPLACED BATTERY PACK (M1670) IAW B737 AMM 33-51-06-960-805, OPS CHECKS GOOD (WORK ACCOMPLISHED BY V934989 AND AAR QC A-15 V93157 5)(SDR NO. 1036813).