As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DEN - ON TAXI FOR FLIGHT 4430 LEFT PACK OFF WHITE STATUS MESSAGE AND MOMENTARY LEFT PACK OFF CAUTION MESSAGE. RETURNED TO THE GATE. PLACED ON MEL REF 21-51-1(A) RSI 356422. AIRCRAFT RETURNED TO SERVICE. ON 2/7 PERFORMED OPERATIONAL TEST OF AIR CONDITIONING DISTRIBUTION SYSTEM IAW CRJ-700 AMM 21-51-00-710-801-A01. TEST GOOD, AIRCRAFT RETURNED TO SERVICE AND MEL CLOSED. NO PARTS REPLACED.