What was found
NR 2 CROSS FEED VALVE CLOSED AND UNABLE TO USE FUEL IN NR 2 RSV TANK. VALVE BODY COULD NOT BE DRIVEN OPEN BY THE ELECTRICAL ACTUATOR. VALVE BODIES ARE FLOWN TO FAILURE. THERE HAVE BEEN TWO OF THESE VALVE BODIES REPLACED IN THE LAST 12 MONTHS WITH AN MTBUR OF 786,875. THIS HIGH REMOVAL FIGURE IS DUE TO THE LARGE POPULATION OF THESE VALVES ON THE 757, 767 AND 747 FLEETS. 9/29/04- FLEET EG PARTICIPATED IN A UNIT TEST AND TEAR DOWN OF THE CROSSFEED VALVE UNIT MR28202 S/N 85402. THE VALVE BUTTERFLY SHAFT O-RINGS WERE AGED AND SWELLED, CREATING SLUGGISH ROTATION OF THE SHAFT.