What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
FSDO GL-31 received notification of this incident via eon. The aircraft was inbound to O'Hare (ord) from madison (msn) when the crew declared an emergency due to a malfunctioning #1 hydraulic system. The aircraft landed on runway 28R with no steering and leaking hydraulic fluid. The runway was briefly closed while the aircraft was towed to gate G18 and so the hydraulic fluid on the runway could be cleaned up. The mechanic was interviewed at the aircraft. The mechanic stated that he discovered the hydraulic fluid level was low so he serviced the hydraulics. After servicing, the mechanic started the #1 engine and another mechanic noticed a large amount of fluid leaking from the engine. The engine was shut down and the mechanics investigated the leak from the engine. They discovered that a metal clamp had cut into the pressure line going to the #1 engine hydraulic pump. The protective coating on the metal clamp had loosened, allowing the metal of the clamp to cut into the line.
As the FAA filed it
FSDO GL-31 RECEIVED NOTIFICATION OF THIS INCIDENT VIA EON. THE AIRCRAFT WAS INBOUND TO O'HARE (ORD) FROM MADISON (MSN) WHEN THE CREW DECLARED AN EMERGENCY DUE TO A MALFUNCTIONING #1 HYDRAULIC SYSTEM. THE AIRCRAFT LANDED ON RUNWAY 28R WITH NO STEERING AND LEAKING HYDRAULIC FLUID. THE RUNWAY WAS BRIEFLY CLOSED WHILE THE AIRCRAFT WAS TOWED TO GATE G18 AND SO THE HYDRAULIC FLUID ON THE RUNWAY COULD BE CLEANED UP. THE MECHANIC WAS INTERVIEWED AT THE AIRCRAFT. THE MECHANIC STATED THAT HE DISCOVERED THE HYDRAULIC FLUID LEVEL WAS LOW SO HE SERVICED THE HYDRAULICS. AFTER SERVICING, THE MECHANIC STARTED THE #1 ENGINE AND ANOTHER MECHANIC NOTICED A LARGE AMOUNT OF FLUID LEAKING FROM THE ENGINE. THE ENGINE WAS SHUT DOWN AND THE MECHANICS INVESTIGATED THE LEAK FROM THE ENGINE. THEY DISCOVERED THAT A METAL CLAMP HAD CUT INTO THE PRESSURE LINE GOING TO THE #1 ENGINE HYDRAULIC PUMP. THE PROTECTIVE COATING ON THE METAL CLAMP HAD LOOSENED, ALLOWING THE METAL OF THE CLAMP TO CUT INTO THE LINE.