What was found
UPON PUSHBACK AND SELECTING PACKS TO OFF, THE APU STOPPED RUNNING. RETRY SAME RESULT BITE CHKD APU CONTROL MODULE. FAULTED SURGE CONTROL VALVE. REMOVED AND REPLACED SURGE CONT VALVE PER MM OPS CHKS NORMAL.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
UPON PUSHBACK AND SELECTING PACKS TO OFF, THE APU STOPPED RUNNING. RETRY SAME RESULT BITE CHKD APU CONTROL MODULE. FAULTED SURGE CONTROL VALVE. REMOVED AND REPLACED SURGE CONT VALVE PER MM OPS CHKS NORMAL.