As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NR 2 EPSU BATTERY (11WL) EMERGENCY LIGHT FAILED TO TEST, ACFT WAS NOT GROUNDED. SCHEDULED RON MAINTENANCE HEAVY CHECK. REMOVED AND REPLACED EPSU BATTERY (11WL) EMERGENCY LIGHT IAW AMM 33-51-38-000-002-A, & 33-51-38-400-002-A. OPS CHECKED GOOD. AIRCRAFT RETURNED TO SERVICE.