As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
IAW L/S CHECK, ITEM 9D EMERGENCY LIGHT TEST GREEN LIGHT DOES NOT ILLUMINATE. BATT PACK TEST SWITCH USED, MID CABIN DISPLAYED. REMOVED AND REPLACED POWER FAILURE BATTERY POWER SUPPLY UNIT, IAW AMM 33-51-01 AND TEST IT OPS CHECK GOOD TEST GREEN LIGHT TESTING OK. (K)