What was found
CABIN PAC OVERHEAT. UNABLE TO CONTROL SUPPLY TO COLDER SETTING. DUCT OVERHEAT EICAS WARNING ILLUMINATED. UNABLE TO COOL CABIN MANUAL OR AUTO. SMOKE VISIBLE IN CABIN AND WEMACS TOO HOT TO THE TOUCH. MAINTENANCE REPLACED THE LT/RT COALESCERS, 35* SWITCH, ACM BYPASS VALVE AND FLOW CONTROL VALVE. SYSTEM OPERATIONAL CHECKS NORMAL. COALESCER PN OFF: 746451-3. 35* SWITCH PN OFF: 9912069-14, SN: 99109484. ACM BYPASS VALVE PN OFF: 754751-2, SN: 02J0808. FLOW CONTROL VALVE PN OFF: 5118-00-3, SN: 0220.