As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
EPSU EXT LOAD EMER L FAULT FOUND ON EMERGENCY LIGHT BITE TEST. TESTED ALL EXTERNAL LIGHTS ON LH SIDE OF AIRPLANE. OVERWING EMERGENCY LIGHTS & LH OVERWING SLIDE (REF LP 7135969 FOR REMOVAL). ALL LIGHTS TESTED OK. REMOVED AND REPLACED EPSU POWER SUPPLY UNIT IAW AMM 33-51-38/401. OPS CHECK OK.