What was found
AIRCRAFT IN CRUISE, ENGINE SPUTTERED AND DIED. BOOST PUMP ACTIVATED AND ENGINE RESTARTED. PART IS AN ON-CONDITION ITEM. THE SQUARE DRIVE ROUNDED OFF UNTIL IT WOULD NO LONGER ENGAGE THE DRIVE GEAR P/N 631684. THIS CAUSED THE FUEL PUMP TO STOP ROTATING RESULTING IN ENGINE STOPPAGE. THESE PUMPS ARE DELIVERED WITH OVERHAULED ENGINES. THIS PARTICULAR PUMP WAS REMOVED PRIOR TO OVERHAUL AND RE-INSTALLED ON ANOTHER ENGINE RESULTING IN THE 2600+ HOURS INSTEAD OF BEING OVERHAULED AT ENGINE TBO OF 1700 HOURS.