As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FOUND LEFT PACK ACM BAD. GROUNDED - YES. REMOVED AND REPLACED LEFT PACK ACM REF B737-800 M/M 21-51-04, REQUIRES LEAK AND OPS CHECK. LEAK CHECKED LT PACK ACM DUCTING DURING OPERATION OF PACK PER AMM 21-51-049790-002-002. LEAK CHECKED GOOD. LT & RT PACK ZONE TEMP CONTROLLER BITE TEST NORMAL PER AMM 21-61-00-700-806-002.