As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE PERFORMING TASKCARD 31-005-00 FOUND FAULT CODE PACK CONTROL CHANNEL R. GROUNDED - YES. FOUND MAINTENANCE MESSAGE 21-55341. TROUBLESHOT PER IFIM 21-51-00-810-835. PERFORM AIR CONDITIONING IBIT, TEST PASSED MESSAGE CLEARED. DETERMINED TO BE INTERMITTENT FAULT. NO FURTHER ACTION REQUIRED.