What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
(-23) Pilot performed an emergency landing into Pittsburgh international airport after substantial hydraulic pressure drop. During inspection of the aircraft by maintenance personnel, hydraulic fluid was found covering the left engine cowling and firewalls. The titanium hydraulic pressure line was found to be chafed through. Maintenance personnel determined that the pressure line was rubbing against the hydraulic supply line. Maintenance personnel replaced the hydraulic pump, Lear part number 6629101000-001 and hydraulic supply line part number 4529101089-001, as well as the hydraulic pressure line as a precautionary measure. Aircraft was returned to service. The flight crew's actions or lack of actions did not contribute to this incident. This closes the investigation of this incident and no further action is required from this office.
As the FAA filed it
(-23) PILOT PERFORMED AN EMERGENCY LANDING INTO PITTSBURGH INTERNATIONAL AIRPORT AFTER SUBSTANTIAL HYDRAULIC PRESSURE DROP. DURING INSPECTION OF THE AIRCRAFT BY MAINTENANCE PERSONNEL, HYDRAULIC FLUID WAS FOUND COVERING THE LEFT ENGINE COWLING AND FIREWALLS. THE TITANIUM HYDRAULIC PRESSURE LINE WAS FOUND TO BE CHAFED THROUGH. MAINTENANCE PERSONNEL DETERMINED THAT THE PRESSURE LINE WAS RUBBING AGAINST THE HYDRAULIC SUPPLY LINE. MAINTENANCE PERSONNEL REPLACED THE HYDRAULIC PUMP, LEAR PART NUMBER 6629101000-001 AND HYDRAULIC SUPPLY LINE PART NUMBER 4529101089-001, AS WELL AS THE HYDRAULIC PRESSURE LINE AS A PRECAUTIONARY MEASURE. AIRCRAFT WAS RETURNED TO SERVICE. THE FLIGHT CREW'S ACTIONS OR LACK OF ACTIONS DID NOT CONTRIBUTE TO THIS INCIDENT. THIS CLOSES THE INVESTIGATION OF THIS INCIDENT AND NO FURTHER ACTION IS REQUIRED FROM THIS OFFICE.