As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
BOI- FLIGHT 2564. ON TAXI RECEIVED A RIGHT PACK CAUTION MESSAGE. RETURNED TO THE GATE. MAINTENANCE CYCLED THE RAM AIR SWITCH. GROUND RAN THE NR 2 SYSTEM AND PERFORMED OPERATIONAL CHECK. CHECKS GOOD. AIRCRAFT RETURNED TO SERVICE. NO PARTS REPLACED.