What was found
LEFT A/C PACK NO PACK OFF LIGHT AND L PACK OFF EICAS MESSAGE. REMOVED AND REPLACED THE LEFT FLOW CONTROL AND SHUTOFF VALVE IAW AMM 21-51-01. OPS AND LEAK CHECKED NORMAL.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
LEFT A/C PACK NO PACK OFF LIGHT AND L PACK OFF EICAS MESSAGE. REMOVED AND REPLACED THE LEFT FLOW CONTROL AND SHUTOFF VALVE IAW AMM 21-51-01. OPS AND LEAK CHECKED NORMAL.