As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PASSENGER CABIN, EMERGENCY LIGHTS BATTERY PACK M1899 FAILS OPS CHECK. REMOVED AND INSTALLED NEW BATTERY PACK POS M1899 AT PASSENGER CABIN AFT RT IAW AMM 33-51-06-960-805, STEP 4.E.(1) UP TO 4.E.(5). (B). AND AMM 33-51-06-960-805 4.E.(6). UP TO 4.E(7). (B).1). PERFORMED EMERGENCY LIGHTS OPERATIONAL TEST IAW AMM 33-51-00-720-801 STEP 3.D.(1) UP TO 3.D.(4). (B). OPS TEST GOOD.