As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
EMERGENCY EXIT LIGHTS OVER 2L AND 2R ARE ON. ALL OTHERS ARE OFF. BITE TEST FAULT AS FOLLOWS ATA 33-51-38 ,EPSU INT LOAD AFT L. REPLACED EPSU 13WL AND BATTERY PER AMM 33-51-38-000-001-A, AMM 33-51-38-000-002-A . OP CHECKS GOOD . ADD EMP:U102091 ROTABLE PARTS CHANGE WAS INDICATED - TT # 1144304 SN OFF 8078 ACP IDT INSPECTION OF EPSU INSTALLATION AND OPS CKS. CKS OK. POWER SUPPLY, C OFF 31-3350-9-9001 8078 ON 31-3350-9-9001 3850