As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
C4 CHECK - DURING INSTALLATION OF THE R-3 EMERGENCY EXIT DOOR ESCAPE SLIDE, FOUND ESCAPE SLIDE LIGHTING SYSTEM POWER UNIT DAMAGED. REPLACED R3 DOOR EMERGENCY SIDE IAW B757 AMM 25-66-03. REPLACED LIGHT TEST SWITCH IAW B757 WIRING DIAGRAM 33-51-14.