What was found
AFTER TAKEOFF, PLUS 25 MINUTES, CLIMBING THROUGH FL250, THE NR 2 ENGINE FLAMED OUT. THROTTLES WERE SET AT CLIMB POWER WHEN CONFIRMED ENGINE OUT MESSAGE APPEARED ON MCDU SCRATCH PAD. NR 2 ENGINE PARAMETERS, N1 AT 51.4 %, EGT 335, N2 335, N2 AT 79.4%, FUEL FLOW 2550, AND NORMAL OIL PRESSURE, TEMPERATURE, AND QUANTITY. AUTOTHROTTLES WERE ON. THE NR 2 ENGINE WAS WINDMILLED FOR 40 MINUTES AT IDLE N2 OF 26.5% AND N1 OF 26.8%. AFTER WET MOTORING THE ENGINE, DETERMINED FUEL WAS LEAKING FROM FORWARD GASKET ON THE IDG FUEL/OIL HEAT EXCHANGER. WHEN GASKET WAS REMOVED, FOUND A TEAR IN RUBBER PART OF THE GASKET.