What was found
FUEL FLOW DIVIDER, TEARDOWN AND TEST OF DIVIDER SHOWED UNIT WAS BY-PASSING FUEL , WHICH INTERRUPTED FLOW OF FUEL TO ENG UNDER HIGH POWER SETTINGS, LEADING TO INTERRUPTION OF ENG POWER AND/OR TOTAL LOSS OF ENG POWER. FURTHER TEAR DOWN, REVEALED DIAPHRAGM WAS STIFF, AN INDICATION OF LONG TIME IN SERVICE. CONNECTING SCREW WHICH ATTACHES DIAPHRAGM TO SHAFT WAS LOSE, NOT TORQUED. ESTIMATED DIAPHRAM WAS MANUFACTURED IN 1967. AFTER TIGHTENING ATTACHMENT SCREW TO ITS PROPER TORQUE, DIVIDER WAS TESTED AGAIN. AT 2.5 POUNDS OF FUEL PRESSURE APPLIED, NO INDICATION OF FUEL DIVIDER FLOWING UNTIL 3.7500 POUNDS OF FUEL PRESS WAS APPLIED. 1 POUND OF PRESSURE DIFFERENCE FOR FUEL FLOW WAS DUE TO STIFFNESS OF DIAPHRAGM.