As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER BOTH ENGINE STARTS RECEIVED A FWD EQUIP OVERHEAT. AIRCRAFT BACK TO BLOCK AND GROUNDED BY MAINTENANCE. MAINTENANCE PERFORMED OPS TEST. EQ. COOLING MANUAL TEST PER AMM 21-58-00 NO EICAS MSG NOTED RAN THE SYSTEM FOR 15 MINUTES. OPS CHECKED GOOD. AIRCRAFT RETURNED TO SERVICE.