As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CABIN ALTITUDE AUTO 1 STATUS MESSAGE.(<P>TRANSFERRED TO MDDR #125793 IAW MEL 21-31-01A, CAT "C", DUE DATE 25MAR20.</P><P>LP 1171509: PERFORMED FIM TASK 21-31 FAULT TREE 809 BITE TEST. NO FAULTS NOTED. MESSAGE CLEARED. THIS CLEARS MDDR 125793.<BR DATA-MCE-BOGUS="1" /></P>)