What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
On June 10, 2011 at approximately 14:42 csd a Gates lear 25 was turning off of the active runway at Addison airport in Addison, Texas. The aircraft experienced brake failure in the middle of the turn while exiting the runway. This caused active runway 15 to be closed for about 15 minutes while the aircraft was being towed clear. There was no damage to the aircraft or injuries to the two crew members. The pilot was contacted on June 20, 2011 about the incident. privacy data omitted Related that the crew had been conducting currency training in tucson, AZ and that the flight back to Addison was normal. He said that the crew performed a right downwind approach at Addison and lowered the gear. The gear seemed to take longer than normal to fully extend/lock and the hydraulic pressure took longer to build back up to the normal range. Upon touchdown, the crew reversed thrust normally and everything seemed fine. While turning off of the active runway the brakes failed in the middle of the turn and the co-pilot had to use the emergency brake handle to stop the airplane. Lanmark ground handling towed the airplane to airframe services to be looked at. After the tow, hydraulic fluid was found leaking from under the left engine. Hydraulic pump failure was suspected at that time. The mechanic at airframe services was contacted to share his findings. privacy data omitted Related that hydraulic fluid was leaking from the underside of the left engine cowling when the airplane was received for maintenance. After removing the cowling and cleaning up the residual fluid, the hydraulic system was re-serviced and bled. The aircraft was then towed outside to the ramp and both engines were motorized to build up pressure. The pressure was normal, but a noticeable leak began at the left engine hydraulic pump. It was found to have a leak at the split line of the housing even though it still built up pressure. It was leaking at a rate of one drop per second. The pump was replaced with a new unit and the aircraft returned back to service.
As the FAA filed it
ON JUNE 10, 2011 AT APPROXIMATELY 14:42 CSD A GATES LEAR 25 WAS TURNING OFF OF THE ACTIVE RUNWAY AT ADDISON AIRPORT IN ADDISON, TEXAS. THE AIRCRAFT EXPERIENCED BRAKE FAILURE IN THE MIDDLE OF THE TURN WHILE EXITING THE RUNWAY. THIS CAUSED ACTIVE RUNWAY 15 TO BE CLOSED FOR ABOUT 15 MINUTES WHILE THE AIRCRAFT WAS BEING TOWED CLEAR. THERE WAS NO DAMAGE TO THE AIRCRAFT OR INJURIES TO THE TWO CREW MEMBERS.THE PILOT WAS CONTACTED ON JUNE 20, 2011 ABOUT THE INCIDENT. ^PRIVACY DATA OMITTED^ RELATED THAT THE CREW HAD BEEN CONDUCTING CURRENCY TRAINING IN TUCSON, AZ AND THAT THE FLIGHT BACK TO ADDISON WAS NORMAL. HE SAID THAT THE CREW PERFORMED A RIGHT DOWNWIND APPROACH AT ADDISON AND LOWERED THE GEAR. THE GEAR SEEMED TO TAKE LONGER THAN NORMAL TO FULLY EXTEND/LOCK AND THE HYDRAULIC PRESSURE TOOK LONGER TO BUILD BACK UP TO THE NORMAL RANGE. UPON TOUCHDOWN, THE CREW REVERSED THRUST NORMALLY AND EVERYTHING SEEMED FINE. WHILE TURNING OFF OF THE ACTIVE RUNWAY THE BRAKES FAILED IN THE MIDDLE OF THE TURN AND THE CO-PILOT HAD TO USE THE EMERGENCY BRAKE HANDLE TO STOP THE AIRPLANE. LANMARK GROUND HANDLING TOWED THE AIRPLANE TO AIRFRAME SERVICES TO BE LOOKED AT. AFTER THE TOW, HYDRAULIC FLUID WAS FOUND LEAKING FROM UNDER THE LEFT ENGINE. HYDRAULIC PUMP FAILURE WAS SUSPECTED AT THAT TIME.THE MECHANIC AT AIRFRAME SERVICES WAS CONTACTED TO SHARE HIS FINDINGS. ^PRIVACY DATA OMITTED^ RELATED THAT HYDRAULIC FLUID WAS LEAKING FROM THE UNDERSIDE OF THE LEFT ENGINE COWLING WHEN THE AIRPLANE WAS RECEIVED FOR MAINTENANCE. AFTER REMOVING THE COWLING AND CLEANING UP THE RESIDUAL FLUID, THE HYDRAULIC SYSTEM WAS RE-SERVICED AND BLED. THE AIRCRAFT WAS THEN TOWED OUTSIDE TO THE RAMP AND BOTH ENGINES WERE MOTORIZED TO BUILD UP PRESSURE. THE PRESSURE WAS NORMAL, BUT A NOTICEABLE LEAK BEGAN AT THE LEFT ENGINE HYDRAULIC PUMP. IT WAS FOUND TO HAVE A LEAK AT THE SPLIT LINE OF THE HOUSING EVEN THOUGH IT STILL BUILT UP PRESSURE. IT WAS LEAKING AT A RATE OF ONE DROP PER SECOND. THE PUMP WAS REPLACED WITH A NEW UNIT AND THE AIRCRAFT RETURNED BACK TO SERVICE.
Other reports on N43DR · 1
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