As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CABIN AIR COMPRESSOR L2 CABIN AIR COMPRESSOR L2 HAS FAILED OR HAS A FAULT, IS UNAVAILABL E, OR HAS BEEN SELECTED OFF. FIM TASK REF: 31-90-F8-01A-421B-A CMC MSG# 2165172. LEFT PACK CONTROL UNIT CHANNEL 2 REF FIM DMC-B787-A-21-50-F1-88A-421A-A PERFORMED OPERATIONAL TEST OF L2 CAC. NO FAULTS NOTED AT THIS TIME.