Service difficulty report · Pump · Lear 35A

Difficulty date
January 17, 2013
Submitted
September 14, 2015
Operation
General aviation
Make and model
Lear 35A
Engine
Garrtt TFE73122B
Part
Pump
Part number
307085059
Condition
Failed
Location
Engine Fuel
Part time
9,575 hours
Stage of operation
AP
How discovered
O
Nature of condition
X, J
Precautionary procedure
O

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

(CAN) REPORTED THAT AN ACFT OPERATING AS DA351 ON A IFR FLIGHT DECLARED AN EMERGENCY AT 2330Z DUE LT ENGINE FAILURE APPROXIMATELY 20NM SOUTH INBOUND TO DESTINATION. EMERGENCY CONTINGENCIES WERE PUT INTO EFFECT BY CARS O/C. ACFT LANDED SAFELY WITHOUT INCIDENT AND EXITED THE RUNWAY. MAINTENANCE REPORT: THE LT ENGINE HIGH PRESSURE FUEL FILTER WAS REMOVED AND METAL CONTAMINATION WAS FOUND. THE CONTAMINATION WAS DETERMINED TO HAVE ORIGINATED FROM THE ENGINE DRIVEN FUEL PUMP. THE AIRFRAME FUEL SYSTEM WAS INSPECTED WITH NO DEFECTS NOTED. THE LT ENGINE DRIVEN FUEL PUMP, FUEL CONTROL UNIT AND FUEL FLOW DIVIDER WERE REPLACED, GROUND RUNS AND A TEST FLIGHT WERE CARRIED OUT WITHOUT FURTHER ISSUES AND THE ACFT WAS RELEASED BACK INTO SERVICE. THESE ENGINES ARE MAINTAINED ON MSP JET CARE. OPERATOR HAS DISCUSSED THE FAILURE WITH MFG AND IS CURRENTLY REVIEWING THE TIMES ON THE ENGINE DRIVEN FUEL PUMPS INSTALLED ON THE REST OF THE AIRCRAFT. ENGINE DRIVEN FUEL PUMP, PN: 3070850-59, SN: MX-355735, TSN: 9,575.0, THERE IS NO OVERHAUL CONSTRAINT.

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