What was found
AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED DUE TO: LEFT PACK LIGHT ILLUMINATED INFLIGHT THEN LEFT PACK SUBSEQUENTLY OVERHEATED. AIRCRAFT RETURN TO AND LANDED SAFELY AT CLT WITHOUT FURTHER INCIDENT. **SUPPLEMENTAL REPORT FOR (AALA202401051381): REMOVED AND REPLACED LEFT HAND SECONDARY HEAT EXCHANGER (AALA202401051381) AND LEFT HAND AIR CYCLE MACHINE (ACM) (AALA202401081857). PER J/C 08L13121001 AND AMM 21-51-04. OPERATIONAL AND LEAK CHECK GOOD.**(CLOSED).