As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
A/C PACK L & R EICAS CAUTION USE PACKS FAILURE AS SYMPTOM FOR A LOSS OF INFLOW CONDITION. LEFT PACK WAS OPERATING INTERMITTENTLY. WAS SWITCHED OFF IAW NON-NORMAL PROCEDURE. UPON ARRIVAL FOUND MAINT MSG: 21-23041 PRESSURE SENSOR (L FLOW SENSOR) SIGNAL IS OUT OF RANGE IN ACTIVE, PERFORMED FIM 21-51 TASK 803 UP TO STEP G.(3). INLET SENSOR FAULT CONFIRMED.