As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) DUE TO A CODING ERROR OF THE AMS SOFTWARE, THE LOSS OF ONE AFD LEADS TO THE LOSS OF ONE BLEED AIR SOURCE. THERE IS A FALSE INDICATION `L (R) BLEED SYS FAIL` CAUTION MESSAGE POSTED INSTEAD OF `21 AIR COND/PRESS - IASC 1 (2) AFD COM LOSS` INFO MESSAGE ON THE EICAS BY THE CORRESPONDING IASC.