What was found
AFTER TAKE OFF, L PACK TEMP FOLLOWED BY L PACK OFF EICAS W/ ASSOCIATED OVHD PANEL LIGHTS IN AUTO (T/S IAW WITH FIM 21-51-848. L PACK TEMP CONTROLLER DID NOT PICK UP FAULT. LP 1480531 ITEM 4 -DURING SYS TEST/INSPECTION IAW 21-51-00 TEMP CONTROL VALVE INDICATION ON L PACK WOULD BLANK WHEN PLACED TO STANDBY W, REMOVED AND REPLACED TEMP CONTROL VALVE (OFF PART: PN HG1050AE15, SN 97021877) IAW 21-51-12, OPS CHECK GOOD. LP 1480533 - ITEM 8; REMOVED AND REPLACED L PACK TEMP PRIMARY HEAT HX CHANGER PRECAUTIONARY DUE TO HIGHER OUT TEMP THAN R PACK. IAW 21-51-02, OPS CHECK NORMAL. LP 1480534 ITEM 10; REMOVED AND REPLACED L PACK TEMP OVERHEAT SENSOR S48 IAW 21-51-12 OPS CHECK NORMAL. LP 1480534 ITEM 11- UPON OPS CHECK OF L PACK, FOUND SLIGHT DUCT LEAK POINTED DIRECTLY AT L PACK OUT SWITCH, REMOVED DUCT AND INSPECTED SEALS FOR DAMAGE, NO DAMAGE NOTED, CLAMP WAS IMPROPERLY INSTALLED, REINSTALLED CLAMPED IAW AMM SUBTASK 21-51-02-434-032. NO LEAKS NOTED, OPS NORMAL.)