What was found
(CAN) DURING CLIMB,THERE WAS A NOTICEABLE POWER LOSS, HIGH T5, HIGH FUEL FLOW, WITH AN INCREASED NG. THE AIRCRAFT RETURNED TO BASE. POST-FLIGHT INSPECTION FOUND THE BLEED VALVE DIAPHRAGM TORN. THE BLEED VALVE DIAPHRAGM PISTON SEAT BUSHING AND COVER WERE REPLACED IN ACCORDANCE WITH P&W TEMPORARY REVISION TR75-01 AND AFTER A SATISFACTORY TEST FLIGHT, THE AIRCRAFT WAS RETURNED TO SERVICE.