As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
UNBALANCED PACK TEMP FAIL W/ TRIM AIR OFF. LEFT PACK TEMP OK AT 25C, RIGHT PACK AT 49C ACCORDING TO FCF CHECK LIST BOTH ARE TO BE W/ IN 6 DEGREES. GROUNDED - YES. REMOVED AND REPLACED CONTROL CABIN TEMP SENSOR REF AMM 21-61-10-000-802 AND 21-61-10-400-801 AND ALL 3 CABIN TEMP SENSOR FILTERS OPS AND BITE CHECK GOOD REF FIM 21-61 TASK 801. BOTH PACK TEMPS ARE BALANCED OPS CHECK GOOD.