As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
APU BLEED AIR STATUS MSG. APU BLEED AIR INOP, APU AIR SWITCH POSITIONED OFF, PLACARDS APPLIED, FWD TO DF MCC INFORMED. -RDF-T :REPLACED APU CONTROLLER PER AMM, NO HELP. INF- :MR49622-37 OFF.MR49622-32 ON. REPLACED SURGE CONTROL VALVE OPS CK'D NORMAL.