What was found
PILOT REPORTED LEFT ENGINE EXHIBITING A DROP IN FUEL PRESSURE AT TAKEOFF POWER. PILOT ALSO REPORTED THAT AFTER LANDING, BOTH ENGINES WOULD EXHIBIT AN UNCONTROLLABLE ROLLBACK OF FUEL PRESSURE FOLLOWED BY ENGINE STALL. TROUBLESHOOTING REVEALED LOW UNMETERED FUEL PRESSURE BEING DELIVERED BY THE ENGINE DRIVEN FUEL PUMPS ON BOTH ENGINES. BOTH FUEL PUMPS WERE REMOVED AND REPLACED (SUBMITTER STATED THIS IS THE 2ND RAYTHEON MODEL 58 TO BE SERVICED AT THIS FACILITY WITHIN 2 WEEKS FOR THE SAME DISCREPANCY.) (X)