As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON TAXI OUT FOR FLIGHT 4310, RECEIVED A LT AIR CONDITIONING PACK FAULT. FLIGHT RETURNED TO THE GATE. MAINTENANCE PLACED ON MEL 21-51-1(A) RSI NR 352561. CLEARED LATER IN THE DAY BY CYCLING THE LT PACK SWITCH. NO DEFECTS NOTED. AIRCRAFT RETURNED TO SERVICE. NO PARTS REPLACED.