As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: PILOT REPORTS DURING TAXI OUT, REAR GALLEY NOTICED STRONG ELECTRICAL SMELL. RETURNED TO GATE. MAINTENANCE REMOVED AND REPLACED R/H AFT CHILLER AS REQUIRED IAW AMM 25-33-02. OPS CHECK OK. NO DEFECTS NOTED AT THIS TIME.