As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING HEAVY MAINTENANCE, OPERATIONAL TEST OF THE EMERGENCY LIGHTS FAIL IN PASSENGER CABIN( REF N/R 2019-87125); REF NR 2019-87125 WO 2019 49/1 PERFORMED CLEAN OF THE CONNECTOR FIN (10WLA) EPSU FWD LT IAW ESPM 20-55-50 AND PERFORMED AGAIN OPERATIONAL TEST OF THE EMERGENCY POWER SUPPLY UNITS BITE CHECK IAW AMM 53-51-00-710-001-A AND TEST IS OK.