As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING MAINTENANCE IT WAS DISCOVERED THAT EMERGENCY LIGHTS TEST FAILED FOR THE FWD LT, R & R EPSU BATTERY AT 10 WL IAW AMM 33-51-38-000-002-A, 33-51-38-400-002-A. OPS CHECK WAS PERFORMED IAW AMM 33-51-38-710-052-B AND OPS CHECK PASSED.