As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DEN - ON TAXI OUT FOR FLIGHT 4177, RECEIVED A RIGHT AIR CONDITIONING PACK FAULT. RETURNED TO THE GATE. MAINTENANCE PLACED ON MEL. MEL CLEARED IN GEG BY PERFORMING FIM TASK 21-51-20-810-802-A01. OPERATIONAL CHECKS GOOD. NO PARTS REPLACED. AIRCRAFT RETURNED TO SERVICE.