What was found
ORD - ON TAXI, NR 4 ENGINE STARTER LIGHT CAME ON. SHUTDOWN ENGINE AND CLOSED BLEED VALVE. FOUND STARTER FAILED, SHEARED COUPLER AND BLOWN DUCT. REPLACED DAMAGED UNITS AND STARTER SHUTOFF VALVE.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
ORD - ON TAXI, NR 4 ENGINE STARTER LIGHT CAME ON. SHUTDOWN ENGINE AND CLOSED BLEED VALVE. FOUND STARTER FAILED, SHEARED COUPLER AND BLOWN DUCT. REPLACED DAMAGED UNITS AND STARTER SHUTOFF VALVE.