As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
F/A REPORTED AFT CIRCUIT BREAKER PANEL MAKES CLICKING NOISE AND CHILLERS CYCLING ON AND OFF. CHILLER M31 CYCLING ON & OFF. VERIFIED AWM 25-33-01, SHEET 1 & FOUND TR 9010ML3 FAULTY. REPLACED TR 9010ML3, NO HELP. STILL CLICKING ON AND OFF. INSTALLED NEW CHILLER, NO HELP. RELAY HARD WIRED INTO CIRCUIT. REPLACED 9005ML3 RELAY. OPS CHECKED NORMAL. REF WDM 25-33-01.