As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(AIRCRAFT NOT GROUNDED) FAILED EMG LIGHTS TEST FOR LOCATION 10WL AND 12WL/ REPLACED EMG LIGHTS BATTERY ON EPSUS FOR LOCATION 10WL AND 12WL I.A.W MM 33-51-38-000-002-A AND MM 33-51-38-400-002-A. OPS CHECKED GOOD I.A.W MM 33-51-00-710-001-A."