As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE PERFORMING THE EMERGENCY LIGHT POWER UNIT FUNCTIONAL TEST, EMB T/C 33-50-01-001-U, THE AFT LT ELPU FAILED TO KEEP THE EMERGENCY LIGHTS ON FOR THE REQUIRED 15 MINUTES WITH A FAULT CODE OF 33500003UT1. R & R AFT LT ELPU IAW EMB AMM 33-50-01. OPS CHECKED GOOD.